The chap in red is quite possibly conducting an internal monologue at that moment in time. Maybe he is experiencing an inner push and pull if you know what I mean. Might be inspired by a lover, a friend, or most likely a family member given the organised placement of photographic evidence on the left hand-side wall which has attracted his attention somewhat. Maybe he hasn't seen his family in a long time? Maybe he is moving on to pastures new and must leave them behind? Maybe leaving his family or friends behind is a weight off his shoulders and a doorway he must pass through to experience a freedom he hasn't felt before. Or is the open doorway merely a convenient way of walking past the phone and avoiding his past? I'm just throwing ideas out there..
Anyone for a crumpet?