The pretzel loop is a large inversion found on flying coasters from Bolliger & Mabillard. The element debuted on Superman: Ultimate Flight at Six Flags Over Georgia and has been used on many other B&M flying coasters since then. It consists of a downward half loop and upward half loop.

A pretzel loop is a signature high-intensity inversion element found exclusively on flying roller coasters, most notably those designed by the Swiss firm Bolliger & Mabillard (B&M). The element is named for its visual shape, which resembles a classic pretzel when viewed from the side. In this maneuver, the train enters at a high point while the riders are in the "flying" (prone) position. The track then dives downward into a half-loop, placing the riders on their backs at the bottom of the element before pulling back up into a second half-loop to return to the flying position. At the lowest point of the dive, riders experience intense positive G-forces (often exceeding 4Gs), creating a "crushing" sensation that is considered one of the most forceful moments in the coaster world. Famous examples of the pretzel loop can be found on Superman: Ultimate Flight at various Six Flags parks and Tatsu at Six Flags Magic Mountain, which features the world's largest version of this element at 124 feet tall.