Bear Grylls VS Bull Sharks | SHARK WEEK 2018

Bear Grylls takes on the challenge of swimming with hungry bull sharks without using a cage - while he s covered in fish guts! #SharkWeek2018 #SharkWeekDiscoveryUK Subscribe to Discovery UK for more great clips: http://www.youtube.com/subscription_center?add_user=DiscoveryTV Follow Discovery UK on Twitter: http://www.twitter.com/DiscoveryUK