They use amyl here, ive seen it more than a few times outside clubs on the street and at a friends party a couple months ago, from what I saw it worked?! they put the bottle underneath there nose even mouth when someone g'ed' out and flat on there ass. If anyone can explain if this is a good practice or knows more about applying amyl to someone g'ed out, id like to know, otherwise it seems like the equivalent to the ice cube trick, whereas form what ive witnessed they seem to wake up almost instantly???..But their heartbeat would be racing more than a dj spinning hardhouse.