I hate when drummers drum (with their sticks) on a surface other than a drum. For example, every morning when I walk into the gym (I’m in excellent shape), the guy at the front desk is “playing” the countertop [of said front desk]. He brings his sticks to work EVERY SINGLE DAY and just plays to the beat of the music coming through the speakers. And for the life of me, I cannot fathom how none of his co-workers have beaten him senseless yet.