What to do? When

[goliquid]

you have a stickman is very loud mouth. Screaming, pounding stick, or talking about baseball acoss the table.

[amish dude]

You are such a good shooter it is meant to distract you !

[IronCross]

I'd seriously just politely ask him/her to stop doing that while I threw. If for some reason they refused, I'd let them know that they single handedly just cost all the dealers a toke.