(A) Hexbug running in a parabolic dish; (B) close-up picture of a Hexbug. n denotes the particle orientation. (c) Observed orbiting trajectory, the arrows represent the particle orientation n and self-propelled velocity v. The color codes are representative of the passage of time, aiding us in distinguishing and identifying the trajectories of the Hexbug over time (Adapted with permission from Ref. [63]. Copyright c 2019, American Physical Society).