Had cobra blood at a Thai SF graduation party in Kanchunaburi. It was just as Magician described. He may have forgotten that the Mekong (local liquor) was hot and packed a real wallop.
At the same party they served monitor lizard. I popped mine into my mouth and ate it. I saw the looks on the Thai's faces and realized I was just supposed to pull off the legs and eat them.
Probably the grossest was walking through the markets. Various soups and curries were cooked in those square 3 gal. tin buckets. They were covered with flies and looked gross but actually were pretty good.
On the trains, venders went up and down the isles selling roasted canaries.