In the near term, another tip would be to help catchers know if they are overdoing either "Stalled" or "Flowing" annotations. The general ratio of all movies to stalled movies is about 8 to 1. Although this could increase or decrease with any given experiment, it might be helpful for catchers to know that this ratio is a good rule of thumb. So if they are marking every other movie as "Stalled", they might want to reconsider what they are marking as stalled.
8. Experience shows approximately 10 out of every 80 movies should be annotated as stalled.
Longer term I could see a feature added to the player statistics box that would show how the player's stall versus flowing percentages compare with the community. This would help a beginning player calibrate whether they are being too aggressive or not aggressive enough with the number of stalls being detected. Although feedback is currently provided about being correct or incorrect, it doesn't show if a player is being too biased one way or the other, (I found a similar feature in the Eyewire game to be extremely helpful in the beginning.)