One night, when he was just 15 years old, Sebastian Green and a friend took a boat from Weymouth Marina and went for a spin. They ran aground and when no-one responded to their shouts for help, Seb leapt over the side to seek assistance – and promptly sank up to his waist in mud. His subsequent rescue involved the coastguard helicopter, an inshore lifeboat and an overnight stay in hospital. He estimates that the bill for this teenage prank gone wrong was approximately £20,000. On 1st February 2008, now 18, Seb set out from Weymouth to attempt to walk round Britain in an attempt to raise £20,000 for charity – a sum equivalent to the cost of his rescue. Yesterday he completed his 3500 mile payback. You can read more here, watch him on TV here, and donate to his charity here. A fantastic story.