And you thought they were all sweet and loveable — hah! In their early days, the Muppets made Miss Piggy look like a pacifist:
From 1957 to 1961, Henson made 179 commercials for Wilkins Coffee and other Wilkins products, including Community Coffee and Wilkins Tea. The ads were so successful and well-liked that they sparked a series of remakes for companies in other local markets throughout the 1960s.
The ads starred the cheerful Wilkins, who liked Wilkins Coffee, and the grumpy Wontkins, who hated it. Wilkins would often do serious harm to Wontkins in the ads — blowing him up, stabbing him with a knife, and smashing him with a club, among many other violent acts.
Remember: When the Muppet offers you some Wilkins Coffee — you take it!
via Bryan Preston