The Official "How Not To" Thread

oh boy..i have a few of these.
Do not put blocks behind the back tires and jack the front up on blocks.I did just that and left the floor jack below the K frame for removal later. I turned around to see the car roll forward off the blocks landing squarely with oilpan on the floor jack below. Someone smarter than me probably would have seen that could happen but i thought with the front higher if anything it would roll backwards so that's where i blocked the tires.
Yes i had to remove and repair the crushed oil pan AAARGH!