I got this map on Garry's Mod called gm_Arena, which is good with wrestling matches, so I did one with a Combine Hunter. Also included is "Duel of the Fates" by John Williams. No noclipping was used (Many thanks to Woof-o-doom Stan for pointing it out), as the rope around the boxing ring was walk-through; no invisible barriers
P.S. if in the event of a copyright strike, I'll take down the video ASAP
Duel of the Fates © John Williams
Gmod © Facepunch Studios
HL2: Ep2 © Valve
https://www.youtube.com/watch?v=MUpXvUvWx6Y