Roller skates on a Roller coaster
Roller skates on a roller coaster: Dirk Auer rides the Mammoth wooden roller coaster on in-line skates
Dirk Auer rides the Mammoth roller coaster wearing in-line skates
Adrenaline junkie Dirk Auer has set a new world record - by in-line skating down a roller coaster
Wearing specially designed in-line skates, Dirk made the attempt on the Mammoth roller coaster at the Trips Drill theme park in Stuttgart, Germany
Reaching speeds of 90km/h (56mph), Dirk skated the 860 metre track in just over one minute
"This was a very dangerous stunt because there were so many factors to consider," explained the 36-year-old
"The roller coaster is wooden and so unlike rides made from iron and steel there was always a chance of the odd nail or screw that would not be entirely flat"
"If the skates were to catch a stray nail then I could have fallen and I would almost certainly have died"
"When I reached the first drop I was 30 metres high and this allowed me to reach speeds of 90km/h on descent"
After this some of the sides were so high that at times I was at 90 degrees and so it was very important to have as much traction as possible"
Luckily everything went according to plan - it was a lot of fun"
Spending two months planning the outrageous stunt, Dirk also designed and made the monster skates, which took him a total of 110 hours of work used 16 rolls on each shoe," says Dirk
Dirk, from Gross-Gerau near Frankfurt, is considered to be the most extreme inline-skater in the world
He already holds the world record for reaching speeds of 307 km/h as he was dragged along behind a Porsche GT2
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