I was just running the LFR and decided to loot the chest and keep it open cause I remember it pissed our raid leader off. All the gold stayed in the chest and the other players went on. Unfortunately I got teleported up and was unable to grab the gold. Later on a wipe recovery two other people were up there with me and it split the roughly 400g gold between us. Unfortunately I only have this screenshot that doesn't really show it but I'll try to do it again on Spine and/or Madness.
TL;DR - Loot chest, hold it open, wait for people to be gone (i.e. through portal on to ship or out of raid after Madness), loot all 400g to yourself.