First of all, if he just ate, he needs to be left alone in his enclosure so he can digest on his hot spot. Secondly, he needs to be fed in his enclosure from not on. (im sure you learned your lesson so no need to bash) There is NO SUCH THING as cage aggression, just idiotic keepers that do not feed their snakes enough and do not have their ball in a routine like they should (but, you must remember, each snake has their own personality. GOOD keepers will know their snakes and how they behave) Thirdly, is this the FIRST time you noticed this?
What is his hotspot at? Needs to be 88-90 degrees and cool side needs to be 78-80 degrees. AT ALL TIMES. What is your room temperature at? Do not EVER expose him to anything less than 77 degrees. For any reason.
Need more info like this to help you out.