“Mayday” (** out of four) was a hokey supernatural thriller in which a federal air marshal (Michael Pare) is on board a flight from L.A. to London in which strange occurrences start happening and people start mysteriously disappearing. Are they being murdered or is something demonic occurring that they need to get to the bottom of? Pare is rock-solid as usual and carries the movie with his authority and swagger but story ultimately decays into sheer corn, as all the characters have to read a spiritual possession book aloud. It might be time for Pare to say mayday because his career really could use a comeback.