Jimmy Fallon has been on a two-week hiatus from The Tonight Show after a hand injury landed him in the hospital. Monday (July 13) he was back, with a cast on his hand and gruesome story about how he almost lost a finger.I am so happy to be back after our two-week break. In fact, I was so excited, I ran around the office giving everyone a high-four, jokes Fallon during the monologue. You should see the other guy. The other guys...