I viewed it once and it looked to me like PU intercepted the coach to keep him away from BU until the situation out there was settled. It was out of the picture, but I have a feeling that BU was probably surveying the situation and issuing those "knowck it offs" or "take it easy fellas" that others mentioned.
Regarding the EJ, sometimes in situations like that, It's kind of like timing on your calls. All right, I saw the action, but it may be the secondary action that determines the EJ or not. Was it a quick little shove to maybe just fend off the contact, or did it continue...