That was probably his mom that liked him, but she paid for the show so she can like or dislike what she wants. The thing that I don't understand is how some a$$hole heckler can get up and go after an act, which interrupts the show for everybody else in the audeience. The a$$hole heckler should be forced to pay everybody back for the cost of the show. Just because one sumbytch decides they don't like the show that doesn't mean that they have the right to interrupt the show for the rest of the paying public.
If a person doesn't like the show all that they have to do is leave.