You ever have a friend who is just... different when he/she drinks? I'm not saying that Jim Kirk has a problem, it's just that I get uncomfortable around him when he drinks. So do my dogs.
Dave's Long Box reader Meng Mantasoot inspired this post when he coined the term "The Bill Shatner Beer Face" which is best described by Meng in his own words (or he'll sue me):
"... [it is] a Shatner Acting Technique™ I've dubbed The Bill Shatner BeerFace™, whereby Shatner acts as he has either never tasted alcohol before or that it is of some unbelievable proof and potency as to cause him to wince, then grimace, then look at the glass to make sure it's the same beverage he was sure he poured into the glass. Works with beer, wine, liquor, Romulan Ale, Saurian Brandy and even plain old water. He basically does it when drinking any beverage..."