The guy was right to sue. With that said, if Monster was smart, they would've given him $50k or whatever, agree to change their inspection procedures, and that would be the end of it. But it looks like they didn't. That's probably why this guy hired a lawyer.
Even though I'm not a fan of suing for trivial stuff (like that case where a chick discovered a fried chicken head inside her bucket of KFC), I'm on this guy's side in this case. Even 1 mouse at the bottling factory is too much. The onus is on the food producer to guarantee the safety of its products.
The poor guy even said he backwashed the can before realizing what was inside.

I'd probably hurl myself.