Oil change gone wrong. Last year I was changing my oil in the truck right when I got home from working outside on a 90 degree day. Being in a hurry, I failed to realize the oil filter seal from the old filter was stuck on there. About 4 quarts of oil spat into the driveway when I started it up. On top of that, the threads on oil pan felt like they got stripped out when I got done with my mess. Thankfully it was just the threads on the drain plug not the oil pan.