Their dare-devil skills are unmatched anywhere in the world.  The Gerlings will be performing two acts – renowned for being the most dangerous to attempt:

• THE DOUBLE SPACE WHEEL in which four of the most extreme acrobats in circus walk, skip and jump inside and outside the pods at the ends of two giant rotating arms. It’s one of the scariest acts in circus.
• THE THUNDERDOME – Four motorbikes race round in the inside of the iron mesh globe known as – the Thunderdome in the centre of the circus ring at 45 miles an hour and the G Force of a fighter jet!!!

From Columbia