Hover bike

The Hover Bike is a vehicle invented by Professor Frink.

History
Frink asks Bart to test it out but he refuses due to there being wet cement up ahead, which he wanted to vandalize. Even though he tells Bart it is a once in a life time opportunity, he still refuses. Later, Frink comes to Bart on the Hover Bike telling him that he bets he wishes he took the chance now.