TRENDING NOW: Girl spits out gum and sucks it back in
Howard Alexander - News Editor
May 29, 2016 - 5:00 AM
This vintage clip from The Late Show with David Letterman was posted to YouTube earlier this month and it's gone viral.
It's from Letterman's Stupid Human Tricks segment and features a girl who can spit out a piece of gun and then suck it back into her mouth.
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