Fired once the unit is considered to be inside a vehicle, as compared to UNIT_ENTERING_VEHICLE which happens beforehand.
UNIT_ENTERED_VEHICLE: unitTarget, showVehicleFrame, isControlSeat, vehicleUIIndicatorID, vehicleGUID, mayChooseExit, hasPitch
- boolean - Vehicle has vehicle UI.
- number - VehicleType (possible values are 'Natural' and 'Mechanical' and 'VehicleMount' and 'VehicleMount_Organic' or empty string).
- boolean - Vehicle can aim.