This is my ruined part of the day, piece was finished and, dumb me (worst words came to mind) I decided that the perimeter wasn't cut all the way down:



the piece jumped out of its place and the running end mill made its last run to death into the piece...


Anyway, to make our lifes a little happier, I ask you to post your SNAFUs and a brief explanation of what caused them, so we all can learn...



Pablo