Or at the bank, or some other mundane locale..
Would you think "Oh, that guy must be one of the best speed metal drummers ever"?
[VIDEO]http://www.youtube.com/watch?v=3ivOfkqFmxg]Dave Lombardo -- War Ensemble -- Big 4 Yankee Stadium - YouTube[/VIDEO]
[VIDEO]http://www.youtube.com/watch?v=9WV5vC3ZQKQ]Dave Lombardo Guitar Center Drum Off 2010 PT 1 - YouTube[/VIDEO]
Edit: The best part of this video is that after 6 minutes of playing salsa-style speed hand-drum beats, the house band has no problem at all cranking out Reign in Blood, vocals and all.