I hate going to mechanics without having a clue what's wrong so I need some help. After work today my 2002 ZX2 (automatic) wouldn't start. First time I turned the key it hitched once, then nothing. No idiot lights but the door open dinger and dome lights worked. Coworker jumped me and it started right away. Stopped in a drive through to get food, idled fine while waiting but when I tried to shift into drive it died. Jumping didn't even work this time. It had to have been getting juice because when it was hooked up to the other car I'd turn the key, hear one hitch, then nothing and idiot lights came on. Disconnected from the other car it was the same as before-nothing, not even idiot lights, except for door dinger. My guess is that the ignition and starter are fine, based on what I hear when it's getting power. I believe that, except for the tires, everything else on the car is stock. I haven't done anything to it since I got it in June 2005 except for oil changes and it has almost 86,000 miles (double what it had when I got it, mostly highway miles). Can anyone help me out before I face the mechanic tomorrow-battery, alternator, WTF?