[JRutledge]

Actually all you do is call the foul and tell the coach the player or coach has been ejected. There is not specific signal or gesture that makes it clear you have called a flagrant foul. Only have called one of these in my entire career, I did us the "baseball thumb" method in the heat of the moment. I did not have any direction or idea what was right or wrong. Then again remember that most mechanics are suggestions, they are not absolutes. It is also possible the people in your area has a specific policy or mechanic to use either at the table or when calling the foul.

Peace