I've never had the pleasure of breaking a bone, but if I did, you can bet I'd be wearing a Casttoo to share my innermost threshold for pain with the world.
Casttoos are customisable cast decals. You email in the image of your choice - yes, X-rays work great, though a shattered Terminator endoskeleton might be a valid secondary option - and they'll mail you out a decal that can be affixed via hairdryer. Prices range anywhere from $US20-$US40, but hopefully, if you're on decent pain meds at the time, you'll have no issues shrugging off the small purchase. [Castoos via bookofjoe via DVICE]