Hey, I'll give Amare Stoudemire the benefit of the doubt: Maybe he was just following directions.
What does it say, after all, on those fire extinguishers you see in public buildings? "In Case Of Emergency, Break Glass"?
Well, being down 2-0 to the Heat, and barely being competitive in doing so, certainly qualifies as an emergency if you play for the Knicks, which Stoudemire does. So maybe that's why he smashed the glass with his left hand, cutting himself and knocking one more cog out of the Knicks lineup for Game 3 of the series.
Of course, there's also the chance Stoudemire just got frustrated and did something really, really dumb.