Ever imagined flying an airplane with your eyes closed? Or driving at nearly 200 miles an hour with a blindfold? How about racing a speedboat in complete darkness?
Sounds crazy? Well take off those blinkers and meet Mike Newman -- the world's fastest blind daredevil.
On Friday, Newman will attempt to break the blind water speed record in a powerboat just off the English coast and secure his place in history.
Being unable to see has proved no barrier to the 52-year-old who is aiming to become the first man to hold the blind speed records for land, sea and air in the same year.
Having already succeeded on four wheels and in the cockpit of an airplane, it is just the sea which stands between him and sporting immortality.
"To hold all the records would be amazing," Newman told CNN, who is hoping to reach speeds of 95 miles an hour in a top of the range powerboat.
"I first started riding motorcycles 12 years ago when I was pushing 40 and I just went from there.
"I moved on to cars after that and I've loved it. People love all types of different sports but for me it was always motorsport.
"I love the engines, the smells, the noises which come with it. I love all the elements and just because I can't see, it doesn't detract from the experience."
Newman's story is as rapid as it is remarkable.
Diagnosed with glaucoma as a child, Newman lost his sight at the age of eight.
But it was not until some years later that he began his love affair with speed -- breaking blind land records on land and in the air.
It was 12 years ago that he first attempted to break a record -- riding a motorcycle at 89 mph after just three days practice.
He twice broke blind land speed records in 2003 and 2005, improving from 144mph to 175mph in the space of two years.
In October 2011 he achieved the world blind aerial aerobatic record; flying the most consecutive loops in formation.
A five times Guinness World record holder, there isn't much Newman can't do.
"The main point of all of this is to make sure that people who aren't able to have these opportunities get that chance," added Newman.
"The charity is doing a great job and although we're only quite young we've made great progress.
"I can't believe the amount of attention we've had. Hopefully it will continue for a while yet."
There will be hundreds of people present for Newman's latest record attempt with television cameras, journalists and photographers all ready to capture the moment.