WARNING: F-bombs and other choice words.
This is a prank from some beauty parlor where patrons see a ghost face in the mirror in front of them (an actual person behind a two-way mirror) when they're getting their hair did. Plus there's a scary movie playing on the TV. Then, the real kicker -- the demon girl actually comes out and starts backwards-crawling around the place. I -- wow -- I would have stabbed her with a pair of scissors and demanded a free blowout for exorcising the salon.
Hit the jump for the video, it's pretty good.
Thanks to Tamy, who agrees this is exactly why you never go to a salon that was built on top of a burned down church.