I taught 14 eager american university students how to scuba dive in some freeeeeezing ass quarry in pennsylvania. I also ate like a FAT KID all weekend. Cookies, chili, pasta, bacon, beer brats, cake, chips....ughhhhhhhh.
Odd thing is, I'm pretty sure I dropped a couple pounds. I wonder if shivering burns a lot of calories? I spent probably a total of six hours in the water over the weekend and the water temp was a balmy 54 degrees, aside from the normal strain of constant swimming, lugging around about 80lbs of scuba gear, etc.