Ed felt his jaw fall open as a second... exotic cow appeared out of no where and thundered towards them.  This one was infinitely more menacing and Ed's blood ran cold as he was hit with visceral jolt of just exactly why Miss Mackay had reacted the way she had.  This.  This was what he had worried about when they'd all stood about blabbering but he didn't have time to think about that which was a shame because vindication would have been a nice feeling to have before dying.  

He was vaguely aware of reaching for a nearby person to push them into action or away from the creature or something before moving as quickly as he could out of it's path.  He'd not had much reason to try and run with his prosthetic before but he certainly did now.