This comes from the Independent Frontier League during a game between the New Jersey Jackals & the Sussex County Miners in Little Falls New Jersey.
It was dollar beer night, so they may have played a role in the incident.
"The incident was all captured on video ... and it's crazy -- 'cause players from both teams bum-rushed at spectators, nearly igniting a huge fight in the seats.
You can see in the clip, players were all the way up in the 2nd and 3rd rows, getting in the faces of fans ... and it appeared the guys were just moments away from letting fists fly.
Fortunately, other players were able to hold aggressors back ... and play resumed without any real, major tiffs blowing up.
As for why it all happened ... it was $1 beer night at the stadium -- and one witness said a fan had no problem throwing some suds at players during a break in the action -- 'causing the athletes to explode."