If you ask me... i wud be scared but first thing i wud have done is kicked that girl away as a self-defence.I think that wud be reaction of many other people as well. That is why i feel that such prank videos are staged.
No.. actually I think most of these are fake. They are too dangerous, half of the people look too old, who would get scared just because the lift got stuck for a while, frightening them would be more dangerous. But I am aware that shows which show some basic pranks do not show all content. My filtering statement was a generic one & not specific to this one.