Doesn't this example really boil down to the tone and (agressive/not agressive) posture of the coach? If he/she is angrily screaming this, while holding the glasses, I think red is in order. If he/she holds them and silently shrugs "Whaaaaat?", it's a yellow.
In a rec league game with a fun atmosphere, a good response may be: "Those better be x-ray glasses, so I can see through the player that blocked my view."
