Question about Mick's strange behavior - video

[blackroses]

This is my all-time favorite Sisters Of The Moon performance....those were the days. I'm sure you've all seen this, so can someone please tell me what Mick is doing at the beginning of this video? Right after he drinks out of the bottle (probably beer), he picks up an object and it looks like he puts it under his nose, then drags it across his beard or something. Then he flicks his wrist and puts it down. Excuse my ignorance, but what the heck is this? It's been driving me crazy for a long time, because I just can't figure out what he's doing.