The one where Kelso comes up to Eric and he goes:

"Oh man, I just read about Pavlov, he was this science guy! And every time his dog rang a bell, Pavlov would drool?"

Eric: "Pavlov would drool?"

Kelso: "Yea! And every time his dog rang a bell, Pavlov would eat!"

Erick: "Wait a minute, are you sure it wasn't Pavlov who rang the bell to make his dog droll and eat!"

Kelso: "No you idiot!!! That's the whole point of the trick!!!"

Eric: "You know, you just read that 30 seconds ago!" LOL!!!


Kelso's trying to get Brooke interested in him and get her to remember that they "did it" at a Molly Hatchet concert. Brooke is a librarian, was valedictorian of her high school class, and in this episode shows no interest in Kelso.

Now, Kelso in a library is hysterical in itself! and Brooke tries to brush him off.

"Brooke: "Michael, you're just not my type I like intellectually interesting people. read, I'm cultured.

Kelso: "I'm cultured!!! I read!!! and I think you're hot!!!"

Brooke: "Oh, your cultured? Do you know what the Dewey Decimal System is?" I'll bet you don't!

Kelso: " Look, I know who Dewey Decimal is!!!! He's Donald Duck's Nephew!!!" LOL!!!

Jack

Two of my favorites...

"That '70s Show: The Career Day (#1.18)" (1999)
Michael Kelso: In the morning my dad and I picked the carrots fresh off the trees
Steven Hyde: Kelso, that's... that's good, go with that.

"That '70s Show: Eric's False Alarm (#4.25)" (2002)
Jackie Burkhart: [tired of Kelso spying on her] Michael, you've lost your mind!
Michael Kelso: Yep, and I don't miss it!

And one funny Kelso moment...

"That '70s Show: Eric's Burger Job (#1.6)" (1998)
Ricky: Name something about yourself that is a weakness.
Michael Kelso: Um...
[falls backwards on chair]