Now that man deserves Uncle of the Decade

I don't see why that needed downvotes. Sure, the response is understandable, but sharks generally don't go after people intentionally.

Yeah, I mean the shark is in their home, we are the interlopers. Sometimes they get confused, like when a bug flies into your mouth. Yuck human!!!

Indeed! In fact, we often look like seals when we're lying on surfboards, which are a much more appetising meal.

Depending on the shark, it can be done in a single bite, a clean amputation, especially with a small arm, as with this one.
http://www.dailymail.co.uk/news/article-58901/Boy-arm-stitched-shark-attack.html

'You're probably wondering how I got these scars...'

Apart from the fact that it happened in Florida.

He could be Australian and was visiting his nephew in Florida.

It was during an Independence Day vacation. Week-long. I doubt many Aussies would visit then and for that short a time.

So metal...