Former NFL prospect Michael Sam was filmed having an explosive outburst on a West Hollywood sidewalk last night, threatening to punch another man he accused of giving "our community a bad fucking name."

In video posted by TMZ Sports, a man in a white t-shirt is seen being held back by a friend, as he postures and motions aggressively at Sam. It's unclear why the altercation started.

"Touch me, I will find that you tried to attack me and I will lay your ass on the ground," Sam is heard yelling in the video, before calling his taunter a "trifling ass bitch."

Before the altercation, Sam was reportedly hanging out at the West Hollywood bar Bootsy Bellows with a group of friends that included EJ Johnson.

Sam has been in and out of headlines since last November, when he told TMZ on another night out in West Hollywood that he was still a free agent trying to return to the NFL.

In 2014, Sam became the first openly gay man ever drafted by the NFL but was cut before the season began. He later signed with the Montreal Alouettes but left the league days later, citing his mental health.