I'm the guy in the picture. I'm glad most of you liked the costume. To answer some of the questions:
1) No photoshop. I really lost my foot to bone cancer last September.
2) I went to Purdue for my undergrad degree and am currently going to UIUC for my PhD. Hence, the old Purdue shirt.
3) I looked and looked for a left foot, but the store only had rights.
4) The foot is in a mesh bag looped over my shoulder. It's hard to hold anything with crutches.
5) Next year: much more blood... and a shark tooth necklace (great idea, Katie!).
More pictures and information can be found here: http://www.brettdaniel.com/archives/2007/11/02/230721/