What have I let myself in for? I've got a Uni reunion coming up and we have decided to meet up in Cardiff....got a telephone call last night to find out we've been booked in to go zorbing??!! Just had a look on the internet to find out exactly what it's about having already agreed to do it.....Arrggh!! Basically I'm gonna be pushed of a hill inside a see through inflatable gerbil ball....I'm feeling green already!! Has anyone done it before??? Please tell me it's not as bad as it looks.