Guest features have been an important part of hip hop throughout its history, and have become increasingly popular in recent years. It's a great way for artists to cross promote between each other's fan bases, as well as give each track a signature shakeup for a verse or two. The only problem with letting other rappers spit, is once in a while they body you on your own shit. See what I did there? Here's 10 of the best times it happened, with a few that just missed the cut.