John McCain was in San Diego on Monday giving a Memorial Day speech with Mitt Romney. But not everyone was happy the war hero was there. A heckler in a black POW-MIA shirt stood up and started shouting. He was quickly escorted out, but as he was leaving McCain had a word for him: “jerk.” The crowd erupted:

Twitchy has captured some of the best Twitter responses.

And how’s this for irony: the outburst came on the same day President Obama spoke out about Vietnam vets being denigrated when they returned home.