Those boards don't work on water…unless you've got power!~ Griff's friends
[Marty tries to evade Griff and his gang, but his hoverboard, over a pond, doesn't move]
Data: Hey, McFly, you bojo! Those boards don't work on water!
Whitey: Unless you've got power!
Data: Hey, McFly, you bojo! Those boards don't work on water!
Whitey: Unless you've got power!
Those boards don't work on water…unless you've got power!~ Griff's friends
[Marty tries to evade Griff and his gang, but his hoverboard, over a pond, doesn't move]
Data : Hey, McFly, you bojo! Those boards don't work on water!
Whitey : Unless you've got power!
http://www.moviequotedb.com/movies/back-to-the-future-part-ii/quote_45745.html