From wiki:
Ten Cent Beer Night was a promotion held by Major League Baseball's Cleveland Indians during a game against the Texas Rangers at Cleveland Municipal Stadium on June 4, 1974. The idea behind the promotion was to offer as many eight-ounce (237 mL) cups of Stroh's beer as the fans could drink for just 10¢ each, thus increasing ticket sales. Ultimately, the game was forfeited to Texas on the orders of home plate umpire Nestor Chylak because of the crowd's uncontrollable rowdiness, and because the game could not be resumed in a timely manner.
Early in the game, the Rangers took a 5-1 lead. Meanwhile, throughout the contest, the crowd in attendance, which was already heavily inebriated, continually misbehaved. A woman ran out to the Indians' on-deck circle and flashed her breasts, and a naked man sprinted to second base as Grieve hit his second home run of the game. A father and son pair ran onto the outfield and mooned the fans in the bleachers one inning later.
SNIP
In the ninth inning, a fan attempted to steal Texas outfielder Jeff Burroughs' cap. Confronting the fan, Burroughs tripped, and Texas manager Billy Martin, thinking that Burroughs had been attacked, charged onto the field, his players right behind, some wielding bats.
A large number of intoxicated fans – some armed with knives, chains, and portions of stadium seats that they had torn apart – surged onto the field, and others hurled bottles from the stands. WJW-TV producer Tony Lolli then suspended the station's live telecast of the game. Realizing that the Rangers' lives might be in danger, Ken Aspromonte, the Indians' manager, ordered his players to grab bats and help the Rangers. Rioters began throwing steel folding chairs, and Cleveland relief pitcher Tom Hilgendorf was hit in the head by one of them. Hargrove, involved in a fistfight with a rioter, had to fight another on his way back to the Texas dugout.
THE FULL STORY:
http://en.wikipedia.org/wiki/Ten_Cent_Beer_NightI was 17, working late nights as a part-time janitor, and would listen to games on the radio. I never forgot this one.