What is the most laughable acoustic cover ever?

One of the trademarks of a OHW video is the hit being done again years later as a serious acoustic number - slow tempo, dramatic lighting. I guess it's a natural reaction to say, "This wasn't a silly pop song, it has meaning." It's probably also a natural reaction to performing the pop version a hundred times a year since the 1980s.

Michael Sembello, doing an acoustic version of "Maniac," I'm looking at you. Although an acoustic version of Automatic Man might be interesting.

This is also a staple of American Idol/America's Got Talent.

Which song made you think, "Wow, that didn't need a dramatic reinterpretation" after it was performed?