All I can think of is he fell, dropped the bike against something, or had it leaning and down it went onto the drive side. The scuff on the tire backs that up.Ow! Mah derailleur!
Never lean a bike against anything with the possibility of it falling. Even a Walmart level bike like that. It's still $10-15 for that front derailleur, and at least that if you need someone to install it, and the front's the cheapest drive train component. Even if it's a junker you should respect your tools if you want them to do their job.
I want to live in a world where he pulls his head out of his ass and surprises everyone - pulling that trailer with that bike shaped object all the way to the Pacific. That'd be awesome, but he's a jackass. I would fly to Palm Springs to meet him when he got there and ride up US74 over the mountain, past all of the crotch rockets racing Ferarris down the mountain with him. I probably wouldn't be alone.