Dr. Horrible's Sing Along Blog drinking games ideas?

Next week my friend is hosting a Dr. Horrible drinking game party. Anyone got any good drinking ideas? Here's what I have so far:

Drink every time a song starts.
Every time Dr. Horrible does his blog.
Every time someone says Bad Horse

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Every time NPH takes a dramatic inhale.

Every time someone says, "Horrible"
Every time an unidentified background character sings
Every time someone gets punched and/or pummeled

I'm a bit late to the party, but at my college, my group of friends have been doing what we call 'Dr. Horrible's Drink along Blog' for about 2 years now. The rules are as follows...

1.Anytime a song Starts
2.Anytime Dr. Horrible twitches his eye
3.Anytime Captain Hammer is Overly Douchy or cheesy
4.Anytime Penny is overly Uplifting
5.Anytime Dr. Horrible/Billy is Emo
6.Anytime there is a Pun.

We also all pick our favorite line and everyone drinks to those, and just end up drinking at whatever makes us laugh. I'm pretty sure your thing is over now, but just in case you ever want to have one again! Hope it was fun!