My DD (soon to be 3) has also been going through the death phase for awhile. Very similar to what has been described above.

Last week we went to visit a friend of mine who has an over sized puppy who doesn't understand her size and ability. Thinking she was outside with the door closed I made the mistake of coming downstairs leaving my child up the stairs to find the door was not closed and the dog came running in and up the stairs to give DD kisses in the face. While doing this she pushed DD over and down the stairs to my horror. She only went down on stair before I could catch her but talk about a heart attack for all. After that incident DD forever informed anyone that would listen that the dog was trying to kill her. I have no idea why the word kill is even in her vocabulary but it is.