trampoline!!!

so.. over the summer, i did a lot of crazy stuff. one of them was buy a huge trampoline! me and my friend landon just decided one day that we should be a trampoline, so we called up sports authority and got one. it was 12 feet by 12 feet!! we set it up in my neighbor's yard(landon's aunty's house) and began to jump. it was a lot of fun. well just thinking back to that, i realized there was some physics involved when i jumped on the trampoline. as my feet lifted off from the trampoline, my body accelerated in the air...but immediately started to slow down. my body was being affected by the earth's gravity. i still began to rise but slowly came to a stop, when i reached the peak of my jump. then like all things, my body came back down. i began to accelerate again, this time toward the ground in free fall at a rate of -9.8 m/s squared. this would continue until my legs reached the trampoline again. i realized that my body was doing exactly what we were doing in class, only thing in class we were throwing balls up toward the roof and we had a sensor underneath. or when we measured our hang time and actually jumped to stick tape on the wall. i wish i could calculate the hang time i had with the trampoline. that would be awesome.