Worst Parenting Moments?

Hey!How about a different twist today.
Lets have your comments on your worst parenting Moments and lessons we all can learn from it.
My worst parenting moments was leaving my child to play on his own and he went into the kitchen and picked up a knife at the edge of the table!!Oops!!Thank God I saw him on time.
Lessons learnt: Never leave your child unattended and also always keep sharp objects safely away