Most rocket engines are internal combustion heat engines (although non combusting forms exist). Plant Land is spontaneously combusting and everything is catching ablaze. The 1937 Fox vault fire was caused by spontaneously combusting nitrate film. There have been unconfirmed anecdotal reports of people spontaneously combusting. Most advanced plants reuse methane emissions by combusting it in a waste-to-energy approach. Another early product contained an enclosed combusting, non-detonating fiber. However, ignition occurred, causing a plume of combusting gas to rise within the tank. The house caught fire during the shootout, possibly from an outdoor-type combusting tear gas canister. On December 2, 2013, Canadian Richard Wygand uploaded a YouTube video describing his phone combusting. This drove Sis to madness and to combusting in the lighthouse's lamp.