Have you ever broke something expensive or caused yourself injury taking a short cut, or failing to take a safety measure you knew to take?

For instance, you were turning something on a lathe but wanted to tool a part and thought you could do so without stopping the lathe and repositioning the tool rest and the gouge catches and goes flying from your hand and smashes the windshield of the truck. Maybe you thought you would stand on the top of an old wood cabinet because the ladder was on the far side of the garage and you were just changing the battery in a smoke detector, it would take less time to swap out than going to get the ladder, but the cabinet collapses causing you a fall where you are injured. Short cuts in those manner where you knew it was not a good idea to do what you did the way you did it, but did not want to take the extra step to do it right; Ever broke something or injured yourself in that manner?