893.35 quadrillion to one. That’s the likelihood of what’s happened to 20-year-old Dylan McWilliams. He was bitten by a shark, attacked by a bear, and bitten by a rattlesnake—all in just over three years. .He’s one of the unluckiest guys on the planet. How unlucky? Since each event is independent the odds of each are multiplied together, he said, making the odds of this happening 893.35 quadrillion to one. Jeff and Anthony are going to politely decline your camping invitation.