This happens from time-to-time when I am being passed.  The car passing me is right beside me (door-to-door).  We are both holding our lines throughout the pass - no swerving and no "beating and banging".  When the other car is just about to clear me, it looks like I gave them a bump and their rear end kicks out for a brief second (most of the time they seem to recover and keep going). Again, I haven't changed my line and I haven't tried to make this happen.  Not sure they "feel" anything inside their or not?  Just curious why this happens - can anyone enlighten me??  Anything I should do to prevent this while still being able to maintain my momentum and racing line?

This happened earlier this evening when ACT was passing me on McKinley.

Thanks

HFR