I did some work on the brakes once, hand tightened the lugs, lowered the car and then my wife pulled up with a load of groceries. I carried in the groceries, encountered a few other distractions, then jumped in the car for a quick test drive. I got a few miles from the house and began to notice a wobble. I immediately knew what the problem was and pulled over. To add insult to stupidity, the torque wrench, lug wrench and cell phone were sitting in my driveway... a few miles away!