cebrian,
A 9 year old can and has driven a big rig before. And if he was regularly in the cab with his dad, he most likely would have had knowledge of how to slow down the truck, downshift and get to the side of the road as best as possible.
How do I know? At age 9 I would drive my fathers semi alongside the combine to fill it with corn then park it near the exit of the field for someone else to drive it to the elevator and unload the grain.
My pokemon brings all the nerds to the yard. And they're like, "You wanna trade cards?" Damn right, I wanna trade cards. I'll trade this, but not my charizard.