Rushing out of the cave and getting into the passage leading to the outside, none of them bother to look back at the main hall of the cave since they have accepted their date. They knew it would be impossible to obtain the stone bed treasure, so why bother about it when their lives were at stake? They should spend more time in the main hall of the cave.
The attack that the red lines were gathering would land on them and with how they had run out of energy from all the battling before they would end up in a dire state.
Sustaining serious injuries that lead to life-threatening so it was better to let go of such a threat. So there was no need to bother about it.
Why cry over spilled milk there was no way to get it back.
While rushing out Dean was in charge of the rear while Miss Onyx was at the front of the group running out of the cave.