That is why you have to have faith in your offensive line to keep them off you long enough to throw. Without that confidence it makes it difficult to perform. As to the plays being called in by hand signals there are many high schools that do that these days and the players are use to that. It makes it easier for those players to transfer into college. For example one particular high school that does that is the Boyd Yellowjackets. They have been doing that for a long time and it has worked well for them. They have a no huddle offense and had a quarterback who broke a school record of over 3000 yards. That is also including the only quarterback from Boyd to make it into the NFL, Billy Joe Tolliver. That says a lot for their offensive line.