Although his ire was sparked more to there not being any point in switching than to the person who was taking my place , I think , and then he fell on the tact that he 'd do better in the room by himself and that the both of us should leave him be ... " he trailed off , " That was when he got particularly snappy . "

Question: Why would be think he would be better off being by himself ?
Answer: He probably thinks we 're not very useful to him at the moment .He probably thinks we 're very helpful to him at the moment .He probably thinks we 're not very bothersome to him at the moment .He probably thinks we 're very useful to him at the moment .