My Dad died a couple of months ago. I know, it happens but we didn't find him in his home where he died for three weeks after his passing. My dad was a trash man, a hoarder, and he had several cats in the house with him. By the time we found him he had decomposed beyond recognition and the cats had eaten one of his hands and part of his face. The cats were nowhere to be found when we found my dad so imagine the smell of a dead, decomposing body, rotted food cat urine and fesses all closed up in a warm house. The smell of death and maggots by itself is a smell you never forget. I can't think of anything smelling worse.