Nah man,when my kids make a mistake (or almost make a mistake), I go out of my way to tell them how they could have avoided it; 9 times out of 10 I end the disc

Nah man,when my kids make a mistake (or almost make a mistake), I go out of my way to tell them how they could have avoided it; 9 times out of 10 I end the discussion with, "And now you know ..." before I realize what I'm saying :P