i think a nice addition to the game would be the option to create an engine that will run in reverse. when you roll in the opposite direction of the engine's normal direction, the engine will spin backwards. on most 2-stroke engines, they can actually fire up and run backwards, if you bump start them the wrong way, leading to reverse being the only forward gear and all of the forward gears being in reverse. in beamng, it could be a simple option like "canRunInReverse" or "canRunBackwards" or "reverseRunningEnabled", followed by a "true" or "false". this won't really have much use in the base game, unless a 2-stroke engine is added to the pigeon, or maybe the t-series, but it would be a useful addition for modders, considering the amount of 2-stroke mods created for those vehicles.