Police
A McDonald's grill operator starts kicking off about being underpaid.
He begins to beat the shit out of the other staff. The police arrive and he kicks their ass. The FBI turn up and he whips their butt too. The CIA, the military, even the U.S. Navy SEALs can't stop the guy.
The manager thinks for a moment, then pushes another grill operator into the fray who swiftly takes out the angry cook!
Everyone looks at the manager, who just shrugs and says, "guess you've just gotta fight fryer with fryer".