When you forget to
flip the 'hold' switch on your iPod, and you put it in your
pocket and start walking, causing a sudden
burst of volume, which frightens you/hurts your ears and causes the 'flinch' response.
*Seeing random spazzing boy trying to rip out his earbuds*
Guy 1: "Hey...what's Jimmy doing?"
Guy 2: "
Oh, looks like he's got his iFlinch on..."
Guy 1: "...poor
guy...he looks like a
retard..."