Fonzie (in response to the spaceship noises)
: All right, all right, all right, who's going "wee-wee-wee"? (noises continue)
I said, who's going "wee-wee-wee"? Ralph, if you're out there and this is a bad joke, I'll give you thirty seconds to find out how much I don't enjoy "wee-wee-wee", eh? (opens door and sees Mork) Whoa, whoa, whoa!
Fonzie: This must be some kind of a dream, y'know? Of course it's a dream, that's why Mary never heard of me!
: Sorry, real thing! I had to zap your mind to make you forget; didn't want you to go bozo city.
Fonzie (when Mork sits on his face): You know, it is very hard to talk to you like this.
Fred McConnell (about Mork): Let me get this straight — he's from a more advanced society?
: Of course there are no germs in here after my spritz-krieg! Ha ha! I hereby declare this room free from — wait a minute. I've just committed germicide.
: Look out! I've got a thermometer and you don't know where it's been!
Nurse: He bit me!
Mork: Please, please I'll do anything! I'll shovel the dishes; I'll wash the snow. Just please, don't make me go back upstairs to him!
— "Sky Flakes Keep Falling On My Head"