Drinking game for ''WebVideo/DoctorHorriblesSingAlongBlog'':

* Every time Billy/Dr. Horrible displays a facial tic, take a sip.
** Hard Mode: Take a drink or shot on the same condition. (WARNING: When his eye starts twitching, drink one time, ''not'' once for each twitch. We almost lost a few people that way.)
* Take a shot every time someone sings over someone else.
** Hard: Count the duets, too.
* Take a sip when light shines off Dr. Horribles' goggles.
* Do a shot whenever Billy/Doc Horrible gets injured.
* Another shot for every time Billy is [[JustForPun horribly]] awkward.