I wasn’t aware of this, but apparently Winnebago Man is something of a cultural phenom; there’s even a documentary about him. From the film’s website:
Type “The Angriest Man in the World” into any search engine, and one name appears—Jack Rebney, a.k.a. “The Winnebago Man”—an ‘80s RV salesman whose hilarious, profanity-strewn, on-the-job meltdown was captured on video and passed around on VHS tapes, before exploding into an Internet phenomenon seen by millions. Filmmaker Ben Steinbauer goes in search of the infamous viral video star and discovers him living a hermit-like existence on top of a mountain, unaware of his fame. Rebney turns out to be as sharp-tongued as ever, but more intelligent and lovable than anyone could have imagined. An outrageously funny and unexpectedly redemptive tale of one man’s response to unintended celebrity, and proof that the truth is both stranger and funnier than fiction.
Check out the video of outtakes from the original commercial shoot. Hilarious, but definitely NSFW:
And thanks to Eve Daniels for letting me know about this!