I have been in France for the last 9 days for easter, and i had arranged for a friend of mine to come over every two days to change the water, and feed him once. He did all of these things, but on the night i came back Shaka(my snake) struck out at me and tried to bite me. I am not sure of what to do next and any advice would be appreciated. (BTW my snake is in the blue stage of shedding, and my friend did not touch him once while i was away).