we got this video from nuken. he gets more than he bargained for. look at that. that would be a said terre. that reef character not happy. >> no. >> you got to get out quickly. he said, and i quote, you care me and this shark keeps coming back at him. the shark doesn't stop there. it keeps coming back at him multiple times. he got close. >> it got really close. it is really coming at him. >> it is aggressive. luckily we have this video and tells the tale. i'm figuring out he's okay. but something you won't forget anytime soon. >> i wonder if she attracted the shark. >> he dropped the canister. >> he left his gear. just got out of there. >> he's 70 feet down. he's looking at his instruments. the shark is circling around. >> it is the shark's world, though. you didn't believe it. videos are popping up everywhere. i got to say it pretty cool. it is called the winter challenge 2014 and the challenge is to jump into an icy lake, icy river, another least dunk your head under the water. one full time and then you nominate someone else and they have the exact same time t