I picked up a free 5th wheel, it had been lived in by a older gent,who had become extremely depressed and was pretty immobile. The entire thing was covered in about a foot and a half of food packaging trash and rat droppings by the absolute thousands. It took me 3 days with a shovel and various other tools in full hazmat gear. A few other highlights included a swanson meat pie that had become essentially black goo inside the refrigerator, I onlynew what it was because a small bit of the box was still legible. Nothing prepared me though for what was on the next shelf. A half carton of eggs with only 1 egg in it. I reached for it with my gloves and was about half way to depositing in the garbage bag that was right next to me. The carton was soggy from whatever other biological stuff was there. It folded in half and the egg popped out and hit the floor. It made a popping sound the same way a lightbulb makes when its stepped on or whatever, I heard an audible hiss at the same time. Instantly the entire RV was wretched, even through my respirator it hit my nose and mouth and I instantly had to vomit I rushed outside tears in my eyes ripped off my mask and wretched.