Poss still going to be a prob tomos. The lights before trafalgar sq a car mounted the central part and smashed the underside of the engine pouring oil everywhere. I went off the light after looking around thinking ‘ok the oil is only on the central bit not on the road yet’ well my rear spun up and there were track marks for the next 10/20meters.
How do cages do it 
thanks for the heads up