[He will spend] a week under water, get dragged out of the water and then get shackled wtih 150 pounds of chains, put back in the water to hold his breath for 9 minutes and break out of the chains.
That doesn't sound healthy. You can also write a message on a piece of paper and show it to him. Anyway, I'm a fan of his magic - less so his stunts - but this sounds pretty cool. I might just check it out. I'm in that area fairly often anyway. I just have to think of what I would write... hint: not what this guy wrote.