I made Severus Snape laugh.

I just saw a play with Alan Rickman in it, in March. (Seminar, if you're curious of the play.) It wasn't unexpected, but when they came out to sign playbills, I stood there staring at him. Every person around me was like, "omg you were SO great in Harry Potter. Like, awesome!" He was really nice and polite, and said "thanks so much" to every praise. When he got to me, I realize I needed to say something different, so I blurted, "I LOVED YOU IN GALAXY QUEST!" And he started laughing hard and said (not sarcastically), "yeah... that was a GREAT movie." I made Severus Snape laugh.