A trailer has gone online for director Rodney Ascher’s The Nightmare, a disturbing documentary on sleep paralysis. Eight people afflicted by the condition share tales of their horrifying experiences. Sleep paralysis affects many, a large number of whom report seeing shadowy figures looming over them.

The film scared the shit out of audiences at Sundance and SXSW, garnering plenty of positive buzz. Whether you have ever suffered an episode or not, sleep paralysis is just freaky. Watch the trailer posted below and think about it tonight in bed. The Nightmare arrives on VOD and selected theaters June 5.

Peep it: