Five-a-side football? I remember a great game at Cambridge one year, with the Saw Doctors.
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Technology can change things. I remember a friend who entered a tripe-throwing contest, and wiped out the opposition by using tripe straight out of the freezer.
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Also in Cambridge Folk Festival for many years there was the last night,late night, ritual of young men making suicidal leaps over and into piles of metal folding chairs, while the onlookers chanted the theme from the Dam Busters. Very primitive stuff, blood and bruises and the odd broken limb.