One guy only knew of pagers as a large coaster like thing that lights up. He asked if that was allowed as his wife was pregnant, about to deliver in a few weeks and the doctor recommended he get a pager since he didn't have a current cell phone. He came in and tried to explain to me why he would need to carry something like that around.
I knew he was describing the pagers from restaurants and asked him if he knew what pagers were. ;D