I would suggest extreme caution with a trampoline. The two of the worst injuries I have received were from falling on a trampoline, not even falling off it. I did a lot of trampoline training at college and continued afterwards in a sports centre with instruction. I have also played five a side football, ice hockey, cricket etc.
You would think that landing on a "bouncy" surface, would not cause injuries. It does. I damaged the cruciate ligament on my left knee. Just doing a warming up exercise, that I had done trillions of times, but landed with one knee a fraction ahead of the other. Also nearly broke my neck on another occasion.
As someone said earlier look at a website which tells you about the possible dangers.