my car has been running fine and then today it stalled and had no power at all so pushed it into a car park checked battery connections. seemed ok. so tried to start it again as soon as it had power to it the battery started smoking from positive terminal and started glowing red then there were flames all in a couple of seconds and while i was putting flames out it started smoking from around the alternator. so i disconnected the battery and now every time i connect the battery it sparks like crazy and heats up. needless to say my car is still in that car park.... any ideas what the problem is and how to fix it. all help would be greatly appreciated.