I almost broke my neck on a trampoline when I was younger. I stupidly tried to do a back flip and landed on my head. I was unable to move for several minutes and struggled to breathe. Still to this day not really sure why my parent's didn't take me to the hospital but I started coming back around and ended up being perfectly fine. Now that I'm older I realize how serious of a situation that could have been and my life could have turned out so differently. I don't think I will ever get my kids a trampoline.
Then there were numerous other times I've gotten hurt on them. I sprained my ankle once falling off. My brother and I would collide with each other all the time on it if we jumped together. My brother landed just right and slipped his legs between the springs and that didn't end well for his bits.
So sorry! I know they can be dangerous. That's why it has taken 7 years to *almost* convince my husband to get one for the kids.