What Do You Do If You’re Heckled During a Major Speech?

It all started out so well. She was firing on all cylinders; strong voice, good eye contact, inspired writing with a personal touch, a couple of good self-deprecating jokes. However, Theresa May, giving a conference speech aimed at revitalizing her standing after a disastrous few months, found herself seriously derailed when a heckler handed her a “P45” form which is the British equivalent of a “pink slip”. What went wrong?  

My feeling is she didn’t handle this guy quickly and firmly enough. Let’s see some fire, Theresa! This heckler is making a mockery of you in public, and stealing a crucial moment from you (not to mention creating a major security risk). Maybe say something like, “you may think the problems of income inequality, affordable housing, and the sinking pound are laughable, but I assure you I do not. Get off my stage, young man.” Instead, Prime Minister May takes the P45 when it is handed to her, as if she is obligated to do so, and tries to continue as if nothing has happened. After a moment or two, she makes a nice joke, and hits back a bit, but not before her momentum is lost.

What do you think is the best way to handle a heckler?