April is trying really hard not to feel claustrophobic right now. Something about crawling in this cave, in the darkness, reminds her of the small and tight places she used to have to go to as a child. To escape the demons.

She clings tight to Clark.

When Ed mimics the knock again, the rock-face closes, removing any natural light from the cave. April slows her breathing, to keep calm and centered.

For Ed, it is less like crawling through a tight cavern, but more like crawling through a bright portal. One where his brother is getting further and further away. Yes, his hallucinations are going there.

Bigby and Clark will soon hear crying at the end of the tunnel.