Competitions and contests that often involve great risk to the participants; unusually popular, especially among some bionts. Proof of recent backup/copy and legal waver is standard on most civilized worlds.
A few popular examples are
the decannual "Venus 2000" nuclear fission ramjet race. First race on Helstrom I (non-terraformed euvenusian subtype, Inner Sphere), 2000 a.t.
Pufferfish Swallowing Contest (first held 5,400, must use authentic terragen baseline pufferfish, banned in many polities on grounds of cruelty (pufferfish sentient rights))
Annual Nude Orbital Reentry Sweepstakes (first held at Dyako (NoCoZo) 3455)
1G ornithopter relay (Majonica, MPA)
Other contests, while not involving risk, are still sometimes included, such as the RetroPrim Tall Ships Races on Pacifica, only pre-industrial (Terragen pre-19th century c.e.) reconstructions of 18th or 19th century sailing vessels are allowed, contestants must only have or use baseline hu-equivalent bodies, no bioware, cyberware, or nanoware that might give contests unfair advantage (greater than baseline strength and endurance, ultra-rapid healing etc) allowed. (Oro Mistral has a splice and provolve version).
One should also mention the DaVinci Games - Must be a working replica of one of the sketchbook designs of that preeminent genius! (Note - the animate Sistine diorama has been outlawed since the third such event, when the hypersapient God icon went 'off the deep end')