In my poor pitiful life there are but two:
The first . . . in the early to mid 70's . . . it was a Jeans commercial. This hippie, who from his apparent condition has done some serious rapid oxidation and subsequent inhalation of the leaves of the cannabis sativa plant, asks a person for directions to some place. The respondent gives said interrogator directions. Said interrogator starts walking off in the opposite direction. The respondent shouts, "Hey, you're going the wrong way!" The hippie turns around and responds, "Hey, man, the world's round, right? I'll be back."
The second:
The Mountain Dew commercial wherein the guy buts heads with a Big Horn sheep for possession of the Mountain Dew.
Geeeezzzz !!!! I almost forgot the Tobasco commercial wherein the guy is sitting on his porch in the bayou eating pizza. He puts a bunch of Tobasco sauce on his slice of pizza. A mosquito alights upon his thigh and starts to suck blood. Pan to the mosquito flying away into the night of the bayou and exploding in mid-air.
the K-ommercial afficianado