"Duh. Is vodka."

Him: One time we go land skiing (he meant cross-country) in high school. I have bottle of vodka in backpack. After while we stop. Vodka had frozen. We try to figure out to get drunk. We decide to break bottle. After we eat chips of frozen vodka.*

Other Co-Worker: Did it work? Did you get drunk off it?

Russian Co-Worker. Duh. Is vodka.

*He is from Siberia. During the winter temps actually go down to like -50/-60 F...cold enough to freeze booze.