My biggest D'oh moment was when I did a favor for a friend who promised to drive a bride and groom from their wedding to their reception. Although I never do weddings, my buddy was called out of town, so I agreed to do it. I got my 13 Buick touring car all gassed up, shined up, lubed, etc. I dressed up in my black suit, bow tie, and bowler hat. Trailered the car to the wedding, unloaded, & parked in front waiting for the newlyweds to go for a ride. I started the car with no problem, pulled away, and started to climb the hill two blocks away and the car just sputtered, and bucked all the way up the hill. It kept running badly almost all the way to the reception and just had no power. About a block away from our destination, I discovered that I had not advanced the spark after I started the car! So, I went around the block a couple of times to show the newlyweds and everyone already at the reception that the old girl really could run nice.