So...is the term "extended arm bar" unclear?

[Raymond]

Originally Posted by Kansas Ref

I disdain college level refs giving clinics/offering advice to NF audiences. They frequently mix up mechanics and confuse NF level refs. Often they will say something like "...in high school ball we do this & that but in college ball we do that & this". Wish that they would let NF level refs be the sole presenters at seminars wherein NF refs are the primary audience or wherein NF type information is to be presented. I worked a NF game with a ref who would hold up two hands with open palms and fingers spread apart at me when I was giving the ball for a throw in after a substitution. I presumed that was his way of telling me "OK, we now have 10 players in the game, go ahead and start throw-in." Later he told me that two hands up meant "stop/pause", I told him that his mechanic was confusing.

When I'm working a HS game, I'm a HS official. When I'm at an HS association meeting, I'm a HS ref. When I pregame a HS game, I talk about HS rules and HS mechanics. I despise it when a HS official makes an incorrect generalization about "college" officials.

What does having two hands up to stop play have to do with college or HS mechanics? Can you show me where in the NFHS signal chart that holding up two hands with open palms and fingers spread apart is the signal for 10 players being on the court?