The "Huffington Post" has put together a list of "strange things" that people have thrown onstage at various concerts over the years ... and how the artist did or didn't respond to it.

It includes:  Kanye West freaking out over someone throwing a COIN onstage ... fans throwing mud and grass onstage during Green Day's set at Woodstock '94 ... and fans throwing eggs during a Justin Bieber concert.


Plus ... someone threw a tomato at Lupe Fiasco ... One Direction's Harry Styles was pelted with tampons ... someone threw their panties at a 70-year-old Tom Jones a few years back ... and Adam Lambert was the beneficiary of a flying sex toy.