Nasty stuff; looks like he got hit by a recluse spider, maybe a widow. I keep venomous snakes{cobras}, and I know some people that have had some nasty bites. I tried to find a video of a fer-de-lance bite, which makes that spider bite look like child's play. I can't find it and don't know how to post pics, but here's a video of a guy well known in Thailand for working with cobras. He died last year from what I understand by taking a direct hit in the face by a king cobra, and here is a video of him "kissing" some cobras. I know I don't do that with mine,lol.

http://www.youtube.com/watch?v=zzFxHr4t4mY