It may come as a surprise that the star of "The Hangover" has cut back on his drinking, but once you hear Zach Galifianakis' story about the night that gave him the motivation, you'll definitely understand.
"I don't know if you've ever been spit in your face, non-sexually..." Galifianakis joked on Wednesday night's "Conan," setting up the story of a tipsy late night walk around Manhattan that ended with him pulling a "Reese Witherspoon" of sorts.
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