$(7)$ A water pipe bursts, flooding a Small Business Company utility room and tripping the circuit breakers on a panel in the room. Small Business contacts Tom, a licensed electrician with five years$$ experience, to check the damage and turn the breakers back on$.$ Without testing for short circuits, which Tom knows he should do$,$ he tries to switch on a breaker. He is electrocuted and sues Small Business for damages, alleging negligence. What might Small Business successfully claim in defense?