yes, should a hybrid have a failure of the system, although we are issued with very thick rubber gloves to handle the car, if the red light is on, it is advisable not to touch the car until a mechanic is on hand to neutralise the system. Bit of a problem if the driver needs help though
Must admit it did seem to me to be a significant fail that one may need to wait for a course car to collect the mechanics from the pits, then potentially drive them 90% of the way round the circuit whilst I driver might be in urgent need of medical assistance.
Not sure when marshalls couldnt be issued with some form of earthing kit.