I vote for June 4th 2012 for the record attempt. That is the date of the annual Cheese Rolling contest at Cooper's Hill in Gloucestershire, England.

What better way to celebrate lots of insane people gathering on the pages of EOFF than by watching lots of insane people dangerously chasing an 8-pound piece of Double Gloucester Cheese down a steep hill.

http://www.cheese-rolling.co.uk/2011.htm

Last years highlights!