I’ve seen this in a couple movies, and it’s obviously done with that sugar-glass stuff or some other movie prop… but regarding doing it for real I’ve wondered:
a) how much strength would it take?
b) would there be much in the way of technique to make it easier?
c) just how long would it take for the lacerations on your hand to heal?
FTR they like getting Chuck Norris to do this movie trick; the two times I remember was when he busted a bottle of water he was holding while tied down to use the glass shards to cut through the ropes with, and the other time in a bar (what movie featuring a martial artist doesn’t have the obligatory “beat the crap outta a bunch of drunken bar flies” scene? :p) where some guy was holding a beer bottle and Chucky grabbed his hand and squeezed until the bottle broke in the guy’s hand.
I’ve squeezed wine glasses to the point where they start to bend a bit once or twice, but never put myself in the hospital by actually breaking them (it takes a fair bit of effort), but a thick bottle would be much harder I think. Anyone know if a mere mortal has a chance in hell of performing this feat?