Does this sound like something an ADD-er would do?

Back out of the driveway and hit the car of a guest even though you knew very well that the car was back there?  DH did this today - this is entirely a new one.  He said he knew it was there but he was thinking about something else....as he backed right into it.

Do you think this might be ADD related - or is this something that could happen to anyone.  I backed out of the garage this morning without hitting the guest's car....