Rob Lilwall definitely challenged himself beyond what would normally be considered sane.
"In September 2004 I began this journey by flying with my bicycle as far away from home as I could think of: to the Far Eastern side of Siberia. My intention was to cycle back to England via the most interesting route I could find. As it turned out, I took a detour to Australia and was on the road for over three years, cycling 30,000 miles through 28 countries, and catching 16 boats to cross the various stretches of water along the way."
He wrote a book about his 3 year journey. Buy @ Amazon.
Here is a video of only one part of his trip: