An aileron roll is a popular stunt maneuver performed by pilots in which an aircraft rolls quickly through its longitudinal axis. There are several synonyms for this term, including barrel roll, Immelmann turn, loop-the-loop, and wingover. The barrel roll is similar to the aileron roll, but it's a bit more complex, involving the aircraft rolling on both its pitch and yaw axes instead of just the roll axis. The Immelmann turn involves a half loop followed by a roll, while the loop-the-loop is a vertical circle maneuver. The wingover is a fake name and describes a bank of more than 90 degrees and then a roll to inverted. All these stunts require great skill and precision and are often performed in air shows and exhibitions to entertain audiences.