I just looked this up and it turned out it was about a production of “cat on a hot tin roof”, a play which famously features a closeted gay lead character. a member of the audience was catcalling female actresses and shouting homophobic abuse when actor john lacy, who played the character big daddy, paused his performance and called him out. the heckler replied “what are you going to do about it?” to which lacy responded by leaping down into the audience and knocking him to the ground.
