'alligator boy' should have been the first clue
If a friend ever says to you "Hey, want to watch a movie about these guys that go on a road trip and some mob boss is after them and they pick up Selma Blair on the way and they meet an alligator boy and an aging hippie and there's this scene with Nirvana fans lighting candles when Kurt Cobain died and that guy from Donnie Darko is in it and so is Jared Leto with a really bad mullet," run as fast as you can. Don't look back.
Trust me. The person who asks you to sit through this movie is no friend.