How often do you ride roller coasters?
Same for bungie jumping, trampolines etc.
In fact, I wonder if this wouldn't be a problem with any fall, say on ice etc.
But bungie jumping and trampoline jumping should not be done whilst you have anything on your person (keys, phone, wallet). You could easily end up hurt even without an airbag.
It's a sorry state, and as far as trampolines go, I'd consider it find as long as it does not impair your movement or hurt you if you land on the pocket, and it's tight enough to not fall out of the pocket if you were to walk on your hands upside down.
I can't find the exact photo at the moment, but I remember one of ads for a phone I came across did contain one.
Also, a quick search for "roller coaster selfie" shows exactly what you'd expect...
High speed impact x gorilla glass x crowds = ugly.
Loose items like hats, jewelry, flip-flops, sure. Items in your pocket? Not so much.