I've Made A Huge Mistake

A couple days ago, I went down to the store to pick up some paper towels and large quantities of gummi bears. When I came out, I got into the car, inserted the key, turned it, and... nothing. The engine didn't make a peep. Panicked, I turned the key again, and still got nothing. After trying four or five more times, I started mentally planning out a phone call to the nearest person I knew. I decided on my grandmother. She lives only about a mile away from the store. So, I called her up, explained the situation, and asked if she could drive down and give me a jump start. A few minutes later, she was there, and I pulled out the jumper cables I keep in the back of the Jeep for just such an emergency. I hooked the cables up just the way you're supposed to, thanks to a call to my dad I'd made a few minutes before. I wanted to be sure about that part, because if you do it wrong, you end up with an IQ comparable to that of Paris Hilton. Anyway, I tried to get the Jeep started several times while connected to my grandmother's Explorer. Nothin'. Then, she offered me a ride, so I acquiesced to defeat, and got a ride back home. Several hours later, my dad called me from the King Soopers parking lot, saying that he'd gotten the Jeep started. Grateful to know that I hadn't broken the dang thing, I asked him if he just started it normally, or if he'd given it a jump start. He said, "I just got in the car and started it normally. The only thing I noticed was that it was in 'drive' instead of 'park.'" That's right, ladies and gentlemen. I couldn't get my own car started because I'd left the thing in "drive" before I went into the store. Laugh it up.