Friend or Foe?

I was standing very still watching and photographing some birds on a tree trunk. Suddenly from my left I heard a scream and turned to see what it was. I saw a rabbit tearing through the trees followed very closely by a stoat. They both vanished from sight but then just as quickly they reappeared hurtling towards me. As they got nearer the stoat was gaining and then - it caught the rabbit. However the rabbit did not give up and I was able to get this shot. I think the stoat got a shock when it saw me. It did not know whether to carry on or run away. It chose the latter, but returned two or three minutes later for another shot at the rabbit. Once again it ran off and the rabbit was still moving around when I left.