There is nothing more unsettling than picking up fresh roadkill.
Usually whenever I found something like that which needed to be moved, the corpse was either stiff, or decomposed enough to need a shovel. This morning, someone hit a cat around the corner from my house and just left it there to rot. This upset me first because an animal died, and second because it was literally 10 steps from the dumpster.
So I got some cardboard and bags over my hands and picked it off the road, onto the cardboard, and straight into the dumpster. (For those of you who want to ask why I didn't bury it instead, there are no dirt plots in my neighborhood, or I would have to give back to the earth.)
It was very unsettling to feel a solid body that you're so familiar with (we own a cat) to just be 50 shades of wrong. I literally felt how the bone structure was totally crushed in a fleshy sack of muscle right through the bags. It was heartbreaking. And again, very unsettling to feel just how fragile it was compared to the living whole of a creature which was always so solid. It made me appreciate our cat even more for being the healthy, weighty ball of fur that he is.