Sorry, couldn't help doing a parody of that post title. Anyway, this is my first "toss in your opinion" post, and I think it's a relatively good topic, but you guys can decide that.
Point and Purpose: We're always talking about what we'd like Strong Bad to do with our emails, or what we'd like to happen with an email in general. But the truth is that TBC thrive on the unexpected; if something deviates far enough from what the viewers expect to happen, it's hilarious!
One of my favorites would have to be the easter egg in "couch patch", where we see Homestar lying on Strong Bad's couch and spitting teddy grahams all over the place. Especially since the link to the egg says "make homestar's head explode.exe", having The Cheat's head explode instead (again!) was the most unexpected thing I've seen in a while! Even after watching it ten times over, it's still entertaining.
Of course, "DELORTED!" ranks in near the top of the list as well.
So, what is your favorite unexpected moment in a Strong Bad Email? A point that sets you up to expect a particular action, only to take it in another direction entirely. Things that make you fall out of your chair, mash your face on the keyboard, cause you to be struck dumb, choke on your lunch, spit out your coffee, or just plain make you go "OMGWTFWINNEBAGO?!?!?"