I also loved how in that brief scene they established Poe and Finn being friends far better than us being told Anakin and Obi-Wan were friends in the Prequels.
yet it happens quite casually and seemingly naturally in TFA with Pe & Finn.
And then again with Finn and Rey. While I believe that they’re not meant for each other romantically their friendship was developed pretty well. I mean even though they barely knew each other I could feel genuine woe emanating from Rey as Finn was being dragged off by a Rathtar.
Yes, you can see and feel that moment where Rey thinks that this man Finn, shows genuinely concern for her - something she may not have been used to on Jakku in her environment before and seems taken aback by it, and this, amongst other scenes is obviously strengthened by him Han and Chewy coming to try and free her on Starbase Killer later on. Her scenes with an injured Finn just before she leaves to find Luke was very well played too.
All this makes me wonder how Finn would react if she turned to the dark side because it’s quite possible that the next time they meet she’ll be a darksider. The only reason I say this is because I think the Finn/Poe dynamic will become more prominent due to Rey training with Luke.