very good composition. The exposure and DOF really lend to the over-all feel of this. The optical illusion of the way the concave shape of the back top lines up with the front one makes it look like there is a halo...I had to look at it for a minute to understand it.
There's a slight tilt to the left that seems whimsical - like dancing just for the heck of it - or like watching a child suddenly decide to skip on the sidewalk- like it was a magical time to do so. Your photo brought me true joy - nothing slick - no tricks. In fact, if I get a song in my head...those tops would tilt the other way too - just think disco (Tango works too). This seems to be essence of photography without all the smoke and mirrors that leaves a new comer like me perplexed with "How in the heck is that done?" - 10 many thanks ;)