October 6, 2015 11:06 pm Jay Leno Jumps In to Deliver ‘Tonight Show' Monologue Jokes After Jimmy Fallon pulls a hamstring during the “Tonight Show” monologue, Jay Leno tags in and tells a few jokes. US & World Videos 1:45 NYPD enters Columbia University in riot gear to clear protest 4:28 ‘Apples Never Fall' and ‘Jurassic Park' star Sam Neill reveals his real name 3:21 Katy Perry's surprising regret about cheeseburger Met Gala look 1:01 Biden administration plans to reclassify marijuana as a Schedule III drug 2:28 King Charles returns to public duties amid cancer diagnosis