Did This Prank Go Too Far (VIDEO)

This video has been all over online, and people are saying that the British Prank Show has simply gone too far.  In the video, people are in an elevator when the lights start to flicker, it eventually goes dark, and a girl comes out of a trap door and screams.  What do you think?  I for one would be FREAKED out!  I would cry, no doubt about it.