An expression for a dead giveaway
when playing a role-playing game
. This is from the all too common experience of a Game Master
who won't provide any detail for any of the rooms the characters
encounter, but then provides a highly detailed description for one particular room or object, such as a mosaic
discovers. This usually indicates something special about the object or room. Maybe it'll be a trap or maybe the key to the whole adventure
. Either way, the players
will focus on that object.
This is such a common occurrence that Game Masters have been known to emphasize the wrong object in a room, causing in the party to focus on that thing so much that they miss the otherwise obvious.