If its by harmful intention a stamped hole is provided on the riders wrist band, 3 is the max you may receive and its abilities is revoked and no refund is issued. Accidentally is usually a verbalize warning is given.
The cars are designed to withstand hard hits, so if someone hits you really hard the most that will happen is you get a bit of whiplash and/or knocked to the side. There are crew members standing by to assist and correct your positioning if such an event happens. Hope this helps!
Thanks! Your answer is awaiting moderation.