My favorite commercial is the California Cheese.

A rooster is crowing and you hear the cows yawning.
One cow says, "Want to get a head start on that alfalfa??"
(rooster still crowing)
"What's the hurry? Hit the snooze."
The crowing rooster goes flying out of the ban smack into a hanging pan on the fence."

I laugh everytime I see it. I know, it's my sick, dry sense of humor. Sorry.

Oh, and I checked. No animals were harmed in the making of the commercial.