Jerry you do understand slightly the wastespark ignition systems that the cars come with from the factory but I hold your statement to not make any logical sense of the destruction of your motor or karims motor. The wastespark fires at BDC which is correct but when the plug lights off, the exhaust valves are open, this wont create any "load" on the pistons/rods, this wont create any kind of "compressive force" because simply with the exhaust valves being open, there isnt any compression in that cylinder. Unless your stock ignition system works different then mine does, im sure you will rethink your explanation.

P.S. Its good to see you on dsmlink forums.