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Dave, the only issue I really give to the 0 rpm torque idea is that piston engines seem to actually require some amount of momentum to build torque.
By that, I mean that an engine can only make so much compression, and likewise handle a limit of combustion pressure, before things start to bend.. Part of this is ensuring that the pressure limit occurs after TDC, but combustion purdue building faster than the piston can move away from it (under load while starting up, for instance) tends to bend/break rods in pretty short order.
Normally, the damage is a function of load, or overloading for a given engine speed, but its quite possible that starting an engine with an explosion in a cylinder could have the s ange effect, as the engines own internal friction could pose significant load on it's own.
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