Because Neil Patrick Harris can SING.

You only have until Midnight tonight to see it for free. My advice? Do what I did--go buy it off iTunes. The entire thing will cost you about $5. It's worth it.

Support Nathan "I'm too sexy to live" Fillion. Support Felicia Day (who needs more shows, because Hot Geek Girl Actors are too few in number). Support Neil Patrick Harris, who impressed the bejeezus out of me at the end of Act 2. And most of all, support Joss Whedon, without whom Buffy, Angel, Firefly, and Dr. Horrible would not exist.

Because if you don't support the people who make your stuff, they'll stop doing it.