X-Scream, Teeter-totter roller coaster at The STRAT Hotel, Casino & Tower in Las Vegas, United States

X-Scream is a roller coaster mounted on a narrow platform atop The STRAT Hotel and Casino tower in Las Vegas, sitting at more than 860 feet above the ground. The track juts out beyond the edge of the building and swings riders forward and backward in a repeated seesaw motion.

The ride opened in late October 2003 when the tower hotel was still known as the Stratosphere. The installation was part of a series of new attractions added to the observation deck at that time.

The name X-Scream is a pun on "extreme". The ride sits on the Strat SkyPod's observation deck alongside the Big Shot, Insanity, High Roller and SkyJump Las Vegas, part of the tower's cluster of thrill rides. Its car rolls 27 feet (8.2 m) past the building edge before braking sharply, a programmed jolt meant to feel like a fall.

The ride opens in the afternoon and closes in the evening, with exact times varying by season. All riders must meet a minimum height requirement of around 52 inches and should be comfortable with heights and sudden movements.

The ride's name is a pun on the word "extreme". The track is a 68-foot straight piece that pivots vertically like a seesaw, and the car rolls 27 feet past the building's edge before braking sharply. The forward roll and rocking motion are programmed to take riders by surprise.