I had an accidental kill where one fell into a rain barrel. It was confusing because the barrel was almost full. Not more than two inches from the top to the water below. It probably climbed up there to get a drink in the first place. But somehow this animal was so blind, diseased, poisoned or something, it never found the way out. It was so close to freedom, but instead it just bumped repeatedly into low walls until it was exhausted and drowned. Another nightmare way to die, brought to you by rats.