What's the most horrifying expirience of your life?

What's the worst thing you've ever seen or expirienced?? My friend told me how she heard a cat meowing in her garden for 6 hours nonstop, and when they found it, it's legs were basically hanging off. Turns out it was walking along the railway, and a train had come past and sliced it's legs off, the impact throwing the cat and it's legs over the fence, where it had slowly dragged itself to safety behind the shed, and cried for help for 6 hours. She took it to a vet, and they eventually put it down, but they never found the owner of that 12 week old kitten.... :( tell yours please :)