Martin Short, Jon Lovitz, Rob Reiner, Danny DeVito, Jimmy Fallon and Robin Williams board a bus in Washington, D.C. -- now that's the beginning a memorable tale.
On Thursday's Tonight Show, Fallon and Billy Crystal shared their favorite stories about the late Robin Williams. Crystal recalled the conversations with his dear friend, while Fallon's story culminated with a classic bit of Williams' zany, self-deprecating humor.
In a lighter moment, Crystal and Fallon swapped mouths for an extra creepy round of "Flip Lip."