At the heart of the circus is a hymn to human potential. While most of us are likely to feel we are pushing our limits by negotiating the steps to the upper levels of the Vector Arena, it is inspiring to see how the disciplined cultivation of strength, agility and concentration enables acrobats to radically extend the boundaries of human mobility and laugh in the face of danger.
Nowhere is this more apparent than in Saltimbanco's duo trapeze act that delivers the exhilarating thrill of death defying bravado.
At one point the seemingly impossible interlocking of feet was the only thing preventing one of the performers from plummeting to ground.
The only problem with Cirque du Soleil is that you are served such a surfeit of the incredible that is hard to maintain any sense of distinction. I suspect the most spectacular acts are not necessarily the most difficult.
Riding a bicycle upside-down and backwards while doing handstands on the handlebars is almost certainly more difficult than it looks.