An exciting new exhibition at the Tate Modern is proving a massive hit with daredevils.German artist Carsten Holler's five steel slides have been installed and run all the way from the roof to the ground floor. The largest is 56 metres in length with a heady 27 metres drop.Holler claims his work, Test Site, which is on show in the gallery's Turbine Hall, is a "playground for the body and the brain".And he's not kidding. Since opening a few days ago, dozens of brave souls have whooshed down the longest slide in a bid to set an unofficial record.And ITN reporter-at-large Harry Anscombe was no exception. But finding his trendy "I work in the media" shirt 'n jeans combo failing to get that all-important momentum going, he had a brainwave.Reappearing from the nearest phonebox dressed in super-speedy lycra, Batman headed for that record attempt. But did he do it?