The Touchdown Kid

A father and son were checking out one day, and the dad's got a pile of X-Box games that he places up on the counter. I talk to him a little bit, and learn first of all that his son plays on his school's football team, and happens to be a runningback. The father says that he regrets a deal recently made with this future NFL hall of famer: every touchdown he scores lands him an X-Box game.

This kid's got it made. He must have some talent, since his father also mentioned that he owes about 9 games already, and the lucrative contract was just signed a couple weeks ago. As if a future career in the NFL where players make million dollar salaries isn't enough, having new games to come home to after gridiron matchups must be enough to motivate him to shake one more tackle and push for the end zone. It would be uber-ironic if the youngster wanted a copy of Madden though. Maybe for every touchdown he scores playing in Madden his dad can take him to a football game.

My question is - can this reward system work backwards? For every fumble, does he have to sell a game back to us? If he gets traded to another team, does he have to switch to Playstation?