When this happens the engine rev high, it is not likely the engine block can be broken in a collision many times that happens. But this can be minimized if you as a rider immediately know the damage that the engine does not try again for distart.
Engine with a low compression ratio, and the engine equipped with a turbocharger or supercharger is less likely to damage it because the distance between the valve piston memliliki gap somewhat further than normally aspirated engines.