Democrat presidential candidate Joe Biden appeared to come unhinged again while touring an auto plant in Detroit. The candidate had been acting jovial just moments before when an exchange with an auto worker became heated after the conversation turned to gun control. Watch below.

.@joebiden touring auto plant in Detroit quickly gets into an argument with a worker over guns. pic.twitter.com/37oCrX62HS — Natasha Korecki (@natashakorecki) March 10, 2020

Biden pointed his finger in the workers face while yelling “wait, wait, wait, wait” and the worker appeared to try to wave him off. A colleague standing next to the worker appeared to pat his back in an attempt to keep him calm. A campaign aide appeared from behind toward the end of the video in an obvious attempt to break the interaction up and move Biden along.

It's difficult to understand exactly what was being said but there is no doubt Biden was visibly angry and raising his voice in an inappropriate manner for the setting. At one point it sounds like he's yelling about “AR-14s.”

This isn't the first incident in which Biden has seemingly lost his temper. Back in February, he called a young woman and "dog faced pony soldier" after she asked him about his poor performance in Iowa.

After a New Hampshire voter asks @JoeBiden why they should trust he can turn his campaign around, he asks if she’s ever been to a caucus before; when she says yes, Biden snaps: "No you haven’t. You’re a lying dog-faced pony soldier." pic.twitter.com/3uxOAu0Ues — Tom Elliott (@tomselliott) February 9, 2020

And don't forget the time he became visibly angry during an interview with Today's Savannah Guthrie after she pressed him on the ethics of son Hunter being on the board of Burisma.