Moving this to Gaming (for fairly obvious reasons) and keeping the thread alive, even though it somehow strikes me that it is unneeded.
Also, I would guess the fireball generator ends right as soon as the player reaches the goal, no?
EDIT: Well, actually, this is unneeded indeed, considering we have a thread for discussion about the New Super Mario Bros. series
and you could have simply posted about this possible "trap" in there instead. That being said, I'm closing this.