After work yesterday, four of us were just about to leave the car park and one lad came up and asked if we could help jump start his car.
So as i was the only one in the group who knew how to do it lol, i pulled the car up next to his signum, poped the bonnets and uncovered his bettery.
So in the dark I spotted a red cable and put the red jump lead on his red then mine, then black to black. But thats when sparks flew a few feet in the air, smoke started to come from both leads and one caught fire lol.
Thats when i thought something might not be right, so i quickly pulled them all off, burning my hand in the process.
After we got the melted leads out the way, i had a look to see what went wrong and there was a big red cable running off his negative terminal! as it was dark and wanted to go home i just saw the red and assumed it was positive.
So a little tip, dont mix! And if you do, wear gloves!