Tic
Complex motor tics are typically more purposeful-appearing and of a longer nature. They may involve a cluster of movements and appear coordinated. Examples of complex motor tics are pulling at clothes, touching people, touching objects, echopraxia (repeating or imitating another person's actions) and copropraxia (involuntarily performing obscene or forbidden gestures).
Tailwhip
The tailwhip is a bike trick typically performed on a BMX, in which the frame of the bike performs a complete rotation around the front end (bars and forks), which remains stationary throughout the move. The same trick may also be performed on a kick scooter.