I particularly love the petrified look on the face of the Mack employee as Joe asks him if he can open the door, undoubtedly after the employees were told in advance, in no uncertain terms, not to allow Joe to touch any machine in the plant, big or small.
"Uh...uh...we...we don't have the key!" Can you imagine if they had let Joe into the cab of the truck? "You guys don't mind if I fire it up, do you? Hey, what does this button do? Let me fire it up, here. Why does this have two brake pedals?"
"Mr. President. Mr. President. Mr. President! Can you just stop the truck? Uh, oh boy..."
Truck jumps forward twice, then accelrates toward people and then the wall. Secret Service agents attempts to jump onto the hood.