When braking leads to a standoff...

I'm riding along, in my groove, doing my thing.  I'm paying attention, so I can already tell the driver heading this way doesn't notice me.  So, I start braking.  Then, the driver sees me and instantly becomes perplexed about what to do, so he brakes.  Now, we're both stopped and in a standoff.  Go - No, You Go - Are You Going, Dammit?!!  I'm now standing flat footed on the ground.  So just go, buddy!  Sometimes there's arm waving involved, either giving direction or out of frustration.  And still, neither of us is getting anywhere.  Crap.  Typically around this time, other cars appear and the driver is now backing up traffic.  In South Florida, it takes all of about three seconds for a driver to start laying on the horn.  Now, I REALLY don't want to go.  I don't trust the driver and the tension is building now that other cars are involved.  I don't want to be the reason the traffic is backed up and several people are honking.  Have I mentioned that at this point I could give a shit who has the right of way.  I will defer to the big, metal monsters and wait for all the cars to go, so then I can.  And that's because in this standoff, I have a lot more to lose than them.