twiddleshock
noun
Surprise at how much time has passed while one did nothing of consequence.
Bored of hitting the random link on TVTropes, Scot glanced at the corner of his computer screen. “Geh!” he said involuntarily, as the listed time gave him a twiddleshock. All he’d done was glance at articles online - nothing big like read a book or watch a movie. How could three hours have passed?