I saw this story, which was upsetting enough as it is: A Culture of (Potential) Assholes: Sexual Harassment in IT. If you care, my response, and another.
However I thought about this in terms of branding yourself. What if someone recorded this? What if the blog mentioned the guy's name? What if there were a picture of him tossing his key?
We all do things we might not be proud of, especially if we've had too many adult beverages, but remember that your behavior might get recorded, in text or other media, for all to see. Have some restraint and set some limits, especially in a professional atmosphere.