It's never nice to be mean to your elderly relatives. But on the other hand, if they've wagered with you that you won't be able to scare them -- as the video above's title suggests -- then maybe they've brought it on themselves.
In the compilation, a girl repeatedly sneaks up on her unsuspecting grandfather in a variety of different situations.
The best is a toss-up between the kayak incident (1:39) and his cheerfully sweary reaction in the final clip.
