For tops:
I'm sitting in my sewer minding my own business when I hear a Big Bang. I go and investigate expecting to see another dead body for me to eat but instead I see someone fully alive. Not conscious but alive. Seems like a fine specimen to lay my eggs in so I take them back to my layer.
For bottoms:
I'm walking in an alleyway when I hear some rustling in the dumpster. I pay no attention thinking it's a mouse or a cat but then something leaps out at me and throws me into the sewer and closes the man hole. I hear some squishy steps as everything fades black.
