What part sounds like a panic attack ?
Got separated from his mates because he was too p!ssed (classic drunk move)
Wandered around aimlessly trying to find a) his hotel or b) a place that would let him in (classic drunk move)
Started getting depressed because he couldnt find either of the above (classic drunk move)
He called his girl in the middle of the night (classic drunk move)
Told her he missed her and wanted to be with her (classic drunk move)
Found himself somewhere he shouldn't be because he opened a wrong door (classic drunk move)
Got himself locked out (classic druk move)
Thought jumping onto a nearby palm tree and then shimmying down was the best option (classic drunk move)
When the first reports came out I did think drugs, either directly or a via psychotic episode wold have had somehthing to do with it. But as the reports have come out it looks more and more likely to me that he just drunk and made one too many alcohol induced wrong decisions.
Bar the palm tree from a 3rd stores bit, I've done what JMac seems to have done many times while solely drunk. I still have scars to prove it too.