[RPatrino]

Personally, I expect coaches and players to have outbursts of excitement and frustration during a game. These can be at themselves or at the umpires or just at the play in general. In the original post, the assistant coach yelled "get a clue" presumably at the plate umpire. As the base umpire, moving from C to B or back to A, if I heard that, I would probably watch the coach closely and see where he was going with the rant. If he continued with more utterances, then definitely that would get him a "that's enough". If the coach is moving toward you and saying 'get a clue' then that is an ejection, pure and simple, but if he is staying in his box and not directing the statement to anyone in particular, then I would let him rant unless it became a tantrum.

I feel that restricting for crossing his arms and 'glaring' at you is taking it a bit far. Besides, I would never restrict an assistant anyway, that's reserved for the head coach. Assistants simply get the door.