Unrehearsed escapology  

Four groups of five people attempted to balance on wooden blocks. Each for an hour over a period of four hours.  

30 people, each balanced on a concrete bollard, for a period of 85 minutes   

30 people, each balanced on a concrete bollard, for a period of 85 minutes   

30 people, each balanced on a concrete bollard, for a period of 85 minutes   

Proposal for Grassmarket Bollard Work, Edinburgh, 4 April 2011