Robot Wars Arena

===CO<sub>2</sub> Jets/Steam Vents===
[[File:Tetanus_steam_vent.jpg|thumb|left|On rare occasions, CO<sub>2</sub> jets could immobilise competitors through reaching exposed gaps in their chassis, such as Tetanus (left) in its Series 5 battle against Onslaught]]
Featured in Series 4-7, these small jets spouted CO<sub>2</sub> upwards from the arena floor, close to the CPZs. While primarily atmospheric in nature, these jets also served as makeshift extinguishers for robots that had caught fire (e.g. [[Cyclone (Extreme Warriors)|Cyclone]] in the US Season 2 Annihilator), and could also obscure the view of roboteers, affecting their robots' control. To a lesser extent, they also caused problems for robots with holes in the bottom of their chassis, as the CO<sub>2</sub> could seep in and freeze their electronics or internal combustion engines. This notably happened to [[Tetanus]] in Series 5 and [[Snake Bite (Swiss)|Snake Bite]] in the European Championship, when they became immobilised after driving over a CO<sub>2</sub> jet. They were also used for comedic effect, such as the moment when a CO<sub>2</sub> jet blew one of [[Ruf Ruf Dougal|Ruf Ruf Dougal's]] ears off in its Series 5 battle against [[Gemini]].