Rap music has had it's fair share of weird collaborations, but I've got to assume Biggie Smalls teaming up with Thomas the Tank Engine has to be the craziest one yet.  Check out this hilarious video, but don't let your kids watch.Keep your kids away from your computer when you're watching this, because it's an unedited Biggie track that features a ton of cursing.  As long as the rugrats aren't around, crank it up and crack up, cuz this has to be one of the funniest videos I've ever seen.