Nikki hits the red carpet for the LA premiere of Dave Grohl's new documentary "Sound City." He talks about the message of the film and how all that rock history ties into the present. Plus, the one story from the movie that really had him thinking long after the credits rolled. Nikki pranks a local Motley tribute band who's looking for a singer. Do texting bans actually make the roads MORE dangerous? And who deserves a bigger tip: your god or your waiter? Listen: