[quote name='matski' timestamp='1321615124' post='1441159']
I hum whilst playing.
[/quote]
Yes, I do this too. Quite loudly hum the bass part I am playing and have to retreat from the mike to stop it coming over the pa. Casual viewing of any video footage reveals that, in addition I nod my head, lower my jaw and hollow out my cheeks, tap my feet and generally fidget. In fact I look a complete prat. But it is all done without realising.