[Meizicht]

xD It's so hard to do both at once though. Since you also have to breathe through the instrument to keep it warm and the keys non-frozen. I think me and a friend or two started it, but we didn't even think about how bad it looked until afterward; we stuck the bells between our legs, stuck our hands in our shirts and blew through the mouthpiece, so it looked REALLY BAD, and by the time our director looked over, the whole section was doing it and he was like "+eyeroll+" and told us to stop it. xDDD
This being in public since it was a contest we were warming up in the parking lot for. Roflolol.