http://youtu.be/o8TaZR5wM7I Niki and Sammy go to great depths to find out about Oli White’s terrifying dive with sharks. Plus Oli gets to take on the challenge of a lifetime - YouTube Star in a Child’s Car. To donate £5 text STAND5 to 70404 (UK Mobiles only). If you're outside of the UK, please donate online at https://www.standuptocancer.org.uk/do... Please note text donations can only be made from UK mobiles. Full T&C's can be found at https://www.standuptocancer.org.uk/terms.