I just found a copy of this commercial online, and I've got to tell you, I'm loving it. If you were alive through the 80s, you will likely remember this. (click for video)
When I brought this up, a co-worker brought up another commercial which I don't really remember, but can certainly appreciate: Mr. Microphone. Hey, good lookin'! We'll be back to pick you up later! (click for video)
Lastly, a commercial I could only find the audio from, but you'll remember this. Ancient Chinese Secret, huh?
http://www.youtube.com/watch?v=wLsONa3gKIQ
The problem with Mr. Yuk was all the kids wanted the stickers, so they'd try to go poking thru the chemicals to find them.
Hey... Anyone remember the Andre the Giant Honeycomb Commercial?
http://www.youtube.com/watch?v=pVh7rhVgoas