I love those, they're awesome! It looks so simple, but it takes a huge amount of skill to be able to hold yourself up without cutting off your circulation, hanging yourself, etc. & still look graceful.
Ooo I never thought of the circulation or airway issues. I did figure that it took some good upper-body strength to pull oneself up so high though, and to hold all those positions.
Tho the best show I saw was the International Burlesque festival. I went to it a couple of years ago in Toronto.