The idea is momentary blip of power loss. Example: when a cam shaft sensor stops sending the signal the engine computer has no alternative than to cut power to the injectors. It literally doesn't know where the camshaft is within the cycle so can't determine when the fuel should spray or the spark should fire.

If any mission critical component is affected the engine will.shut off to save the engine from self destruct. If the power blip is short enough you won't even notice. The accessories will still run.

Consider: if you turn the key one click back the accessories still run but the engine shuts off and if you turn back to start position nothing happens. Eg engine will not start running again. I don't think it matters if you do it fast enough that momentum carries the engine far enough it would run the computer won't send fuel or spark.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)