Jump Ball Toss - What would you do?

[Nevadaref]

I'd have to double check the officials manual, but I thought that the R has the responsibility for the two jumpers. Assuming that is correct, then I believe that the R should be looking up during the toss to see if a jumper taps the ball or not. That way he knows for sure whether to blow his own toss back in this situation.

Since you are literally two feet away from this play, you have the best look and it doesn't have to become a trust your partner situation. You can share the duty of making sure that the toss is administered correctly.