I HATE Heelies!!!
When I was in the watch store, we had all these kids zipping through out displays with no regard to anyones safety. I asked them several times to stop, to no avail, til finally I said loudly enough for the 'rents to hear, "Fine, if you get it hurt its not our fault."
Parents looked pissed, kids stopped, the family left.
Whoever invented those heelies needs be lock up for a few hours with my two cats when they had way too much 'nip