Elevated is a 1997 Canadian short film directed by Vincenzo Natali and cowritten by him and Karen Walton, who also participated in the writing of Ginger Snaps.
Visibly shaken, Hank quickly explains that something outside which he claims looks like an alien is killing people and was about to get him. Ben disbelieves the guards story and attempts to send the elevator back down but finds that he cant control it. Hank reveals he used the card and Ben angrily tries to grab it from him, but is repelled back when Hank takes out a springassisted knife to defend himself. Eventually, Ben restrains Hank while Ellen tries to call the lift telephone for help, to no avail. The elevator rocks and the lights go out, causing the three to stop. Ben reveals he has claustrophobia and uses Hanks knife to open the elevator panel and fiddle with the controls in order to operate the lift, but Hank stops him. Ben then tries to get the lift ceiling hatch open, but Hank stops him and tells him and Ellen that the monsters outside will get in and kill all of them. The lift becomes operational once again and Ellen manages to wrestle the card away from the men and use it to send the elevator down to the garage. Ben, desperate to be out of the lift, presses the button for floor 39.As the trio watch, the elevator doors open but there is no sign of any monsteralien outside. Ben steps out and invites Ellen to join him in leaving the building via the stairs. Ellen initially accepts but becomes fearful of Ben when she sees Hanks knife in his pocket. She dashes right back in to the elevator before Ben can stop her. While the lift goes down, Hank presses the stop button to halt the elevator and Ellen becomes panicked, saying that she wants to go down. Before they can argue, someone attempts to open the lift hatch. Hank keeps the hatch shut while instructing Ellen to send the elevator to floor 44. This causes the thing outside to stop its attempt to enter, but dents the hatch. Before the two can react, theyre startled by Bens mutilated corpse which comes tumbling down into the elevator. ........
Source: Wikipedia