In golf, a hole-in-one with no witnesses except the player. By extension, any unusual, rare, wonderful, unlikely event, achievement, experience, etc...with only one eyewitness.

Anatidaephobia is defined as a pervasive, irrational fear that one is being watched by a duck. The anatidaephobic individual fears that no matter where they are or what they are doing, a duck watches.

Anatidaephobia is derived from the Greek word "anatidae", meaning ducks, geese or swans and "phobos" meaning fear.