Hoverboards need land. As everyone knows, hoverboards don’t work on water. Unless you have power.
In case you didn’t know, this knowledge comes from the movie Back the the Future II.
Marty McFly learns this the hard way in Back to the Future II when he tries to outrun Griff Tannen and his gang. Griff, Biff Tannen’s grandson, reminds Marty that hoverboards don’t work on water unless you got power. This Back to the Future hoverboards need land t-shirt helps to remind everyone about hoverboard safety and that hoverboards need land.