Worst: My Father in law, 6 days after he killed himself by sealing up a bathroom and lighting a charcoal grill. He had not been dead so long that the smell went away, but he was in full decomposition when we went in to clean him up. We put VICKS under our noses, but the smell was still awefull.
Next to worst: My dad and I went and collected a couple hundred worms for fishing. They were all in one bucket that we placed in the garage for our fishing trip...and left in there for three days. He made me "dispose" of them--worms that have been dead for three days smelled as bad as my dead FIL, maybe worse, because I did not have the VICKS.
Almost as bad. I was at a storage area, and someone kicked one of those poison traps at me. This one held rat's remains that had been dead a while. The liquid in the trap went all over me, and was quickly washed off by my vomit. I still retch when I think about that one.