Start with a one letter word. Then add one letter (anywhere) at a time to create another word. (So the second word will be 2 letters, third word woulld be 3 letters and so on). Get to at least 7 letters. My final word is something I don't want to happen to me. Two restrictions:
Only one proper noun allowed
Only 2 vowels allowed.
Hope this is not too open ended. Of course special kudos to anyone who comes up with the longest word.