Man's Brain: WTF!!!
Man's Stomach: Yeah, I'm hungry. What should we do
Man's Brain: ..... ehhh. I dunno!
Man's Penis: Hey face muscles, look like your taking a shit, maybe that'll scare him.
Man's Anus: Should I shit one out too?
Man's Penis: No, you idiot. It's called "FROWNING". We just want to look grumpy and express our displeasure at the dinosaurs actions.