I haven't used a trampoline since I was a teenager. My neighbors had round one that I would guess was 12-15' in diameter. There were numerous injuries that I can recall, the worst being a broken leg. All of the injuries that I recall were due to what I would consider (now) to be inappropriate use. We would play dodge ball where one or more people would be on the trampoline and people off of the trampoline would throw a ball at them. I chipped a tooth doing that. Sometimes we would put a lawn sprinkler underneath the trampoline if it was really hot. I believe that is how the broken leg occurred. We did many other less stupid but still somewhat risky things, too, like doing front and back flips and seeing how high we could jump.
My point, though, is that if you do find any safety statistics take into account how they compare to how you would actually use it. Do the stats take into account the stupid things teenagers do on them?
If I can't do any flips on the trampoline, I'm not sure it's worth it.
Another question is whether there's any simple neck-brace I can wear to avoid spinal injuries, which are the main thing I'm worried about. I'm okay with a 0.1% chance of pain, it's life-altering injuries (or more to the point, work-altering injuries) that I want to avoid.
I have often benefited from recommendations for Things I Didn't Know I Wanted.
Given that Less Wrong is a community of unusually intelligent, critical, and self-improvement-focused people, I suspect we can generate a pretty helpful thread of product recommendations — perhaps even a monthly thread of product recommendations.
Rules: