Double bouncing on a trampoline happens when two people jump together and one person lands just before the other, transferring extra energy through the mat and launching the second person higher than they could jump alone. It’s a simple concept, but the physics behind it matter, and so do the serious injury risks.
How a Double Bounce Works
A double bounce requires two people on the trampoline mat: a “pusher” and a “flyer.” The pusher lands on the mat a split second before the flyer, pushing the surface down and loading it with elastic energy. When the mat snaps back upward, that stored energy combines with the flyer’s own downward momentum, launching them significantly higher than a normal jump would.
The timing is everything. The pusher needs to hit the mat just before the flyer lands, so the mat is at its lowest point and loaded with maximum energy right as the flyer makes contact. If both people land at the exact same time, the energy disperses and neither person gets much extra height. If the timing is off in the other direction, the mat is already rebounding when the flyer lands, which can create an unpredictable, jarring bounce.
The pusher’s weight relative to the flyer also changes the effect. A heavier pusher transfers more kinetic energy into the mat, which means the flyer gets launched higher. This is why a double bounce between an adult and a child can be especially dangerous: the smaller person absorbs a disproportionate amount of force and can be sent far higher than expected, with little ability to control the landing.
The Basic Technique
Both jumpers start bouncing in a steady rhythm near the center of the mat, a few feet apart. The pusher and flyer need to synchronize their jumps first, bouncing at the same pace and height for several cycles. Once the rhythm is established, the pusher adjusts their timing to land slightly earlier than the flyer on one specific bounce. This means the pusher cuts their jump short, coming down a fraction of a second ahead.
When the pusher hits the mat early, they drive it downward just as the flyer is descending. The flyer lands on a mat that is both depressed and about to rebound with the combined energy of both impacts. The result is a noticeably higher bounce for the flyer. The pusher, meanwhile, often barely leaves the mat on the next cycle because they’ve given up most of their energy.
For the flyer, the key challenge is staying balanced and centered during the amplified bounce. The extra height comes on fast, and if you’re leaning even slightly to one side when it happens, you can be thrown off balance or sent toward the edge of the trampoline. Keeping your core tight, your eyes forward, and your arms close to your body helps maintain control.
Why This Is Genuinely Dangerous
Double bouncing is explicitly prohibited at virtually every commercial trampoline park, and every major trampoline manufacturer designs their weight limits around a single jumper. There are good reasons for this.
According to the Royal Society for the Prevention of Accidents, 60% of trampoline injuries occur when more than one person is using the trampoline at the same time. The American Academy of Pediatrics recommends restricting trampoline use to a single jumper on the mat at any given time, noting that multiple jumpers increase injury risk, particularly to the smallest participants. A 10-year study at a pediatric neurosurgery center documented cranial and spinal injuries linked to multiple users, including one fatality involving an 11-year-old boy on a trampoline with multiple users at the time.
The core problem with double bouncing is unpredictability. The flyer has no control over how much force they receive or exactly when it arrives. A slightly mistimed push can send a person sideways instead of straight up, or load the mat unevenly so one leg absorbs more force than the other. Ankle fractures, knee injuries, and spinal compression injuries are all documented outcomes. The flyer can also gain enough unexpected height to lose control entirely and land on the frame, springs, or ground.
Weight Limits and Equipment Stress
Every trampoline has two different weight ratings. The single jumper weight capacity is based on how heavy you are and how high you jump, set to prevent “bottoming out,” which means hitting the ground through the mat at maximum bounce height. The structural weight capacity is much higher and represents the total static load the frame can handle before parts bend or break. For example, one large recreational model holds up to 1,500 pounds of static weight but has a single jumper capacity of only 220 pounds.
When two people double bounce, the dynamic forces on the mat spike well beyond what either person’s weight alone would produce. The pusher’s downward force adds to the flyer’s impact force, and the mat absorbs all of it in a fraction of a second. Even if both jumpers are well under the structural weight limit, the peak dynamic load during a double bounce can approach or exceed what the mat and springs are rated to handle. Over time, this accelerates wear on springs and stitching. In a single session, it can cause a sudden bottoming out that sends the flyer’s feet, ankles, and knees straight into the ground beneath the mat.
Reducing Risk if You Choose to Try It
If you’re going to double bounce despite the risks, a few factors make a meaningful difference. Both jumpers should be close in weight. A large weight mismatch dramatically increases the force transferred to the lighter person and makes the outcome harder to predict. Stay near the center of the mat, since the edges provide less rebound and are closer to the frame and springs. Start with very small, controlled bounces rather than trying for maximum height on the first attempt.
The flyer should keep their knees slightly bent on landing to absorb the extra force, and both people need a clear signal to stop. Many injuries happen when one person wants to end the session but the other keeps bouncing, creating unexpected forces on someone who’s trying to stand still. A mat with someone actively bouncing on it is not a stable surface, and trying to walk or stand while another person jumps is one of the most common ways people get hurt.
Children under six should never be on a trampoline with another jumper. Their bones, particularly in the spine and lower legs, are not developed enough to handle the sudden compressive forces a double bounce produces. Even among older kids and adults, the smallest person on the mat absorbs the most risk.