"So you're saying Arnold @Schwarzenegger is..."
"An actual Terminator, yes."
"From the future?"
"No, no. James Cameron built him in '84 so he wouldn't have to pay an actor. He's been renting him out ever since."
"They put a real Terminator on the set of Kindergarten Cop?"
"Yep."

"Where'd he get the skin?"
"The what?"
"Arnold's human skin. Where'd he get it?"
"Oh, funny story. It's Andy Kaufman's skin."
"What!?"
"Yeah. James won it in a poker game in '81."
"But Kaufman was alive in 81."
"Who do you think he won it from?"

"So you're telling me an actual T-100 wearing Andy Kaufman's skin has been rented out to Hollywood for 30 years to do movies like Commando and Jingle All the Way."
"Don't forget Twins and Junior."
"Oh God, I did forget Twins and Junior."
"He almost killed Devito. Twice."

"Why the hell did Devito keep working with a cyborg trying to kill him?"
"That's actually a popular misconception. You see, a cyborg is an amalgamation of synthetic and organic parts. Take away either and it can't function. A Terminator works just fine without the skin."

"Fine, grammar Nazi, why did Devito keep working with a killer robot through two movies?"
"Are you kidding? Where else are you going to find a straight man in this town?"
"Okay, fair point."