Not recognizing someone (or something) we're supposed to know is a serious social faux pas, so we do our best to cover it up, yet sometimes we can't help but give ourselves away.
Tourists mistake one member of the House of Lords' greeting to another as a command to kneel.
A ruse used to mask a forgotten name backfires in an embarrassing manner.
Restroom user responds to cell phone user's conversation overheard from next stall.
Mentally disabled adult captures delivery person, Jehovah's Witness, or salesperson after mistaking him for a troll.
Child's drawing depicts Mom as a pole dancer when in reality she was trying to sell a shovel.