You slowly crawl forward, being careful of each and every spot you place your hands and feet. The process take a long time and you hear the sound of the rubble creaking as parts collapse. You keep forward though, keeping your cool and inch closer and closer to the light. As you continue you hear the rubble collapse completely.

(You gain the [Concussion] condition for 6 hours. Disadvantage on all rolls. Max Stacks 1. 3 Enhanced/Agile Movement to Resist)

As the dust settles you find yourself out of the debris and head towards the light slowly. There you find an exit to this passage.