After Curtis was turned into a werewolf in "A Gorey Demise", Erik found out that the only way to get Curtis back to normal is to drain him of all physical energy.
Curtis: Well, that's great but how are we going to wear me out?
(Erik gives him a devious smile. Cut to the two of them at a bar.)
Erik: Fifty dollars for anyone who can beat my friend in a fight!
The ending of "A Corpse in My Bed." Both Curtis' and Erik's reactions when the barrel-thing from "The Angel of The Odd" made its first appearance were absolutely hilarious.
Erik: "Okay, I'm outta here! Wake me up in a week!"
This little gem from "The Meek Shall Inherit the Earth":
All the conversations the monsters have before the host announced the annual obituaries in "A Gorey Demise" is seriously the funniest moment in the whole song; but let us go to the specifics....
"Hello, everyone!"
"Hey! I thought this was a party; it seems pretty dead!"
"Do you have a date this year?"
"YOU'RE ALL LIARS! YOU SAID THERE BE COTTON CANDY!"
"Who made the jelly look violet?"
"That's not candy, that's just slimy...."
After singing "The Greatest Show Unearthed" at one concert, Curtis points out that he did all the La-La's in all the songs and the character voices; but Erik's reaction to it was priceless.
Erik: "Shut up! That's gay!"
Curtis(in a creepy voice): "Hey! Who put the head in the fish tank?"
Also in that same concert, the way that Curtis says "SAILOR MOON!" was very good, too.
And when Curtis was tongue-tied when he says "My Supace.... My Supcaces".
And let's not forget about this gem:
Curtis(To Erik): "Well, maybe you should; there's a lot of good comments about your tight jeans."
The Noodle Incident in Such Horrible Things. "When I was fourteen... nothing much happened. (Beat) Well... there was that one time!"
During one 2012 concert, Curtis played along with his microphone stand not cooperating with him.
In fact in one of their concerts, Curtis' microphone got UNPLUGGED! And Erik smiled!