Thomas Lennon from "Reno 911" was just trying to give our camera guy a little impromptu hernia inspection yesterday ... when suddenly, Breckin Meyer appeared -- and it was time to throw down!!!
You gotta watch the video ... it's pretty damn funny.
'Reno 911' Star Picks Fight with Breckin Meyer
9/16/2010 8:50 AM PDT BY TMZ STAFF
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