Eric announces,

"Reaper escaping. Gather."

He prepares his mind, and once everyone has acted he manifests Fold Space, headed into the next room along with anyone else who reaches him in time. The Astral Construct is directed to move toward the door, but is unlikely to make much progress until the whole web is burnt; most likely the fire will destroy it.

Spoiler: OOC
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Talking is a free action, even out of turn, so this can be considered as Eric acting last. It does leave enemies at our backs, but Eric isn't as much of a tactician as he is a psion; furthermore, the risk may be acceptable.