If a brief scare like that causes someone to have a heart attack they were a bomb waiting to go off anyways, I just don't care for the clip cause it's been done so many thousands of times before it's really just not that funny.
For a more effective scare prank, that you can do and film practically anywhere, tie up a fake spider from black or brown insulated wire and drop it over some-one's shoulder and onto their lap. I've done it 3 times this week, on various guys who profess not to be scared of insects etc, and the results were identical.