Just about a month ago the battery in my wifes escort went dead. I checked the water levels, put it on the charger overnight. Still dead. Went and got the battery out of the Scamp, dropped it into the Escort and proceeded to hook up the positive cable to the negative post, and when I put the negitive cable on the positive post,,,,, I got lots of sparks,,, and the cable kind of stuck there so I couldn't pull it right off.. then silence,,, nothing.
I'm thinking, oh great, I just blew up the entire electrical system on my wifes car. Luckilly it just blew out the fusable link.. I replaced it, and got the Correct Battery, and everthing was fine.
But I felt pretty stupid after almost 30 years of working on cars, that was the first time I hooked up a battery backwards.