 In 2004 , Thorpe Park approached Guinness World Records to set the record for the " Most Naked People on a Rollercoaster " . In May 2004 , 81 students took part in the record , which was set at 28 – the number of seats on a single Nemesis Inferno train . In August 2004 , Nemesis at Alton Towers broke the record with 32 riders . 
