The Reduced Shakespeare Company's Hamlet quotes the line "a couch for incest."
In their version, one of the guys follows that with, "Insects!"
And the third says, "A couch!"
I laugh every time. More than it deserves.
"Now everyone was giving her that kind of look UFOlogists get when they suddenly say, 'Hey, if you shade your eyes you can see it is just a flock of geese after all.'"
"You can't erase icing."
"I can't believe it doesn't work! I found it on the internet, man!"