This was a scene in the FIRST 20 minutes?
Because, and I guess I'm dating myself a little, my first thought with "white guy and black guy in a parking garage" was THE STAR CHAMBER.
Not in early 90's, but may have been aired then...
And, my second thought was that there are LOT of movies with that basic plot element, so I, personally, would need more....
Sorry.
I know it's not much to work with - I've presented it as it was presented to me. When I got the request I said the exact same thing ... "can't you give me anything more?" I think the reason it had to be the first 20 minutes is because they walked out of the theater as it was that bad...
I'll run these bits by my friend and see if we have any hits. Thanks for the effort!