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What's the best way to get someone you don't know to laugh?
Show them a viral video, if the clip below is anything to go by.
Only three of the 12 participants completed the Fine Brothers's challenge of not laughing at some YouTube classics including
Flea Market Montgomery
Pretty much everywhere, it's gonna be hot
Grape lady falls!
The best part? Watching their faces as they try.
Kim Sears actually wore this to the Australian Open final