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					Originally Posted by BigV
					
				 The sound was literally deafening.  People came running from all over the floor, even from the floor below. | 
	
 Without access to liquid nitrogen, dry ice works well when mixed with a little water, or 
Red Devil brand Lye and aluminum foil.  Louder than a 12 gauge and enough to make car alarms in a nearby parking lot go off.  The little 20oz bottles usually blow out the bottom and are still pretty damn loud.  In a dorm setting, lowering an "armed" 20oz with a string to someone's window two stories down at 3:30 in the morning is hilarious.
Beware:  they are, under legal definition in most states, bombs.  They will blow your fingers off, getting caught is a bad thing, don't try this at home, etc, etc.