Law enforcement sources tell TMZ ... Bruce Jenner dialed 911 last night at around 7 PM, after his neighbor allegedly went ballistic at the valet stand outside the Kardashian's Hidden Hills home.
Our sources say witnesses told police the neighbor appeared intoxicated as he protested the valet situation -- and at one point fell over and cut his face.
Sources close to the family tell us Pastor Brad -- the guy who married Khloe and Lamar -- was all about being Christian on Christmas and tried to help the neighbor up.
What he allegedly got for his good deed -- a right jab, courtesy of the neighbor.
Sources say Bruce got in the middle and broke it up. No one was arrested.
We're told the pastor is okay -- free to marry other wayward Los Angeles Lakers.