Everyone exhibits it, of course.
People misplace their keys.
They enter a room only to realize they don't know why. They talk to mannequins before realizing that a reply isn't likely. One of Dr. Langer's favorite examples of mindlessness concerns the time she used a brand new credit card in a department store. The clerk noticed she had not yet signed it, and handed it to her to sign the back. After passing the credit card through the machine, the clerk handed her the credit card receipt to sign.