When research started into fuels suitable for internal combustion engines a peculiar new phenomenon was discovered. Researchers noticed that when engines were being run at certain RPS (revolutions per minute) the engine would suddenly fail, often in spectacular and unpredictable ways. This came to be referred to as Critical Instability.
Energy release and the aether
Normally it is not possible to manipulate the aether mechanically, but as with almost everything there is an exception and in this case it's critical instability. What happens is that when energy is released it has a nigh on immeasurable effect on the surrounding aether. The effect is so small that even at extremely high levels of energy released (like when detonating an atomic bomb) the effect on the aether is still negligible.