He could swear he 'd been here before ... What had he been doing last night ? He could remember breaking up with Scorpius , having a few drinks ... and then leaving with a stranger . And that was it . That was where his day had ended .

Question: What may have happened if Scorpius was not there ?
Answer: His day may have ended .He may have had a few drinks with the stranger .They may not have split up .He might need to call Scorpius .