There was an abandoned kitchen manufacturer near where I live and a few years ago, they started demolishing it. Now, the area I live in had this place, then there was us, and then there is this saltmarsh right next to the river leading to the ocean, which means those two areas are perfect places for rats to breed. The street was lucky because it seemed the majority of rats at the manufacturer made their way to the saltmarsh and away from everyone.
Except one little bastard.
One rat decided to make its home on the street. And it made sure to let you know that, as one cat found out. Now, I know my neighbours tried everything to get rid of it, one tried humane traps, another got a Kerry Blue specifically to kill it and we tried traps baited with chocolate (Before anyone laughs, its a legitimate trick, they prefer sweeter things, like jams. Mice prefer them too.), and one broke out the rat poison. Nothing worked, the rat apparently jumped onto the humane trap and left a "present" on top of it, the Kerry Blue couldn't find it and poison was taken away because of concerns that someone's pet would accidentally eat it. Oh...and the little bastard mocked us but stealing the chocolate off the trap without setting it off. We'd hear him skittering around outside, could never see him though.
This went on for about a week until the day I did some gardening and was putting the shovel back into the gardening shed when I heard this "SCHLUNK!" sound.
Needless to say, I didn't look down, went off, got a black bag, shovelled what was left into the bag and threw it into the bin.
End of the rat.