invisible gorilla

Just a few minutes of mindfulness can boost your awareness.
What the invisible gorilla study shows is that if we are paying very close attention to one thing, we often fail to notice other things in our field of vision -- even very obvious things. What if this perceptual quirk has serious, even life-threatening, implications?
The bottom line, Dr. Dalton said, is that even seemingly obvious distractions can be missed when attention is focused elsewhere
In one of psychology's most stupefying experiments, Dan Simons made a video at Harvard that set out to test just how much our mind can see when it's busy.