With Miles having agreed to slip into the house to retrieve Jack’s wallet, it’s 85% certain that he’ll be running out a few minutes later with that big gorilla right behind him.
Obviously Miles should have told Jack to keep the engine running and the driver door open so Miles can hop right in and gun it. But no — as Miles runs out Jack has fallen asleep, the car is shut off and the driver door is closed.
In real life Miles would’ve never been made it, and that big, naked, blue-collar ape would’ve grabbed him and pounded away.