According to this story in ChessVibes, untitled Bulgarian Borislav Ivanov (2227) was "strip searched" at the end of a tournament that saw him score 6/9, defeat 4 GMs and draw two more, and finish tied for third at the Zadar Open with a spectacular 2697 performance rating. The arbiter had him remove his shirt and empty his pockets, and finding nothing after examining Ivanov's pen, apologized and let his performance stand. (Calling it a "strip search" makes it sound rather salacious, even if it's (barely) true, lexically.)
Ivanov's result is of course pretty improbable, but as he's a fairly young player on an upward trajectory (even if it isn't the trajectory of a prodigy), it's not as unlikely as it might otherwise be. This looks like a good job for Ken Regan and his IPR tests. (Are you out there, Ken?)