Here's a situation...
I'm at trail and I see a quick pass to the post area. A1 passes the ball and B1 tips the pass. The ball then goes untouched OOB. Isn't this an appropriate time to let your partner know that the ball was tipped by the defender?
This "mechanic" has saved me several times in those bang-bang pass situations. When my partner sees that I have a tipped ball, he knows to give it back to the offense.
And, yes, I know that this is not a "real" mechanic.
Thoughts?