Charlie Sheen went insane at the Staples Center Wednesday night, after a security guard told him he couldn't re-enter the stadium after taking a smoke break -- and it's all caught on video.

A female, no-nonsense security guard would not budge when Charlie tried to get back in, then Charlie snapped, yelling, "You know what?  F**king blow my balls, alright, you f**king asshole."

A little later Charlie's buddies try in vain to keep him away from the camera. The "Anger Management" star then explains, "Have common sense and common courtesy gone in society? That was what I was trying to impress upon her."

The guard tells a photog she told Charlie to "F**k off."

FYI, Staples has a policy of not letting people in once they walk out.

Charlie left the stadium without ever getting back in.  He told TMZ, "Bad juju. Clash of the silly." And then his parting shot ... "Go Thunder!"

Charlie had a bad time from the get go at the game. On his way into Staples, a taunting fan screamed,  "You ever done bath salts?" Charlie's response -- "Would you ask me that at a f**king dinner party you moron ... go f**k yourself."

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