I've run into a mailbox on my bike while turning my head to see what my friend was saying, when my friend was saying "Look out for that mailbox!"
On the highway, I sometimes swerve a bit because I was trying to look at the cows in the field I'm driving by and have forgotten that I'm the one driving.
I've tried to put eyedrops in without taking off the cap and then getting confused and trying to unblock the nozzle, finally throwing the eyedrops at the floor and THEN realising the cap was on.
I'll try to reach into [insert container type here] while the lid is on several times before I understand why my hand keeps hitting something.
I've walked into doors, doorframes, door knobs multiple times.
I don't recognise people until they are right in front of me and waving frantically.