You try and turn the music down on your laptop with your t.v. remote despite the t.v. already being muted.
Or, reaching for a drink and picking up the Elmer's glue bottle but not realizing that it isn't your drink until you have just touched your lips to the screw-top.
It happens to the best of us, and by us I mean women. Men don't even know what the word multitasking means. They get to the multi and pull a Homer. DUH?