negative fill light

I was wandering in the rain tonight and came across a tavern that advertised "Aerialists tonight." It was early so I had a chance to look around the place, mid sized tavern with a very high ceiling.  Built into the rafters were some ropes, drapes and a small trapeze.  I found a spot in front of a 6 foot high jukebox which offered me a flat stable surface and a bit of protection from the folks who crowded in just before showtime.  

So many people squeezed in that I'm sure we were way over the fire marshal's limit and more kept coming in.  Once I put my arms up to situate the camera it was almost impossible to put them down again.  A pickpocket would easily have robbed anyone near but probably not have been able to get away.  

It's funny I suppose but a guy kinda bumped into me a couple of times and then looks at me and says, quite demanding "I'm trying to get through, EXCUSE ME!!!"  WTF?  "You'd better be able to fly then ass hole."

Oh well.  Couple of shots here.  It was very dark.  I was shooting full open, ISO800 and -2 or even -3 EV so either 3200 ISO or 6400 ISO.  None of my images are very good, the aerialists moved quickly and constantly but it is interesting to me how Negative Fill Light works here.  Top image AUTO in SPP, next image has negative fill light applied.  It seems to work the way a spotlight would have worked.  No particular manipulation, I did crop a bit to take nearbye heads out.  The 3rd image is just to kinda show the height of the ceiling.