Dave Mustaine doesn't seem like the kind of guy who takes kindly to being interrupted during day-to-day conversation, let alone while he's holding forth from the stage during a Megadeth concert. As one foolhardy fan learned during the band's Oct. 7 show, Mustaine won't hesitate to call people out for being rude — even between songs and in front of a crowd.

As you can see in the fan-shot footage above, Mustaine was in the middle of a pre-song monologue prior to the night's performance of "Holy Wars ... The Punishment Due" when he was distracted by a member of the audience talking loud enough for him to hear from the stage. "I'm going to wait until this a--hole is done talking," Mustaine told the cheering crowd, assuring the fan, "Go ahead — whatever you've got to say is more important than whatever I have to say."

Duly chastened, the fan presumably quit talking, only to be told to stop "acting like a kiss-ass" and ordered to "talk or shut the f--- up." Mustaine paused a few moments more before turning back to the crowd, calling the offending audience member a "turd," and continuing with his story by beginning, "Like I was saying before I was so rudely interrupted by this pile of s--- ..."

With that out of the way, the band eventually got down to the business at hand, and delivered the rendition of "Holy Wars" everyone was waiting for. Check it out below, and visit Megadeth's site for a complete list of currently scheduled upcoming dates.