Quote from Kelso in Whole Lotta Love
Kelso: Sorry I'm late. I was cutting through backyards on the way over here and the Hendersons got a new jungle gym. Whoa. They're still yelling? Eric: Yeah. I'm trying to read Red's lips, but I can't make it out. He keeps calling me a "stupid duck." [snaps fingers] Ah! Kelso: Hey, I'll go spy on them. I just gotta run home real quick and change into my ninja outfit. Eric: I don't think this situation calls for camouflage, Kelso. Kelso: Well, that doesn't mean it's not fun to wear, Eric.