Clauses prohibiting high risk activities have been common. I've heard of clauses prohibiting boxing, skiing, car racing, mountain climbing, skydiving, even motorcycles, but I don't think scooters are a high enough injury threat that teams will be clamoring to add that specific restriction. There would have to be a rash of NFL scooter injuries or at least a one or two high profile injuries for that to happen.Would not be surprised moving forward there will be a clause in the contracts about injuries occurring due to riding electronic scooters make future guarantees null and void.