Smears of red led away from the corner, even farther back through the data towers. They traded positions methodically as they followed the trail toward the rear of the Archives. Jacklyn was glad for Yanis’s clear hand signals because she couldn’t hear anything over the rush of her own blood. The smears stopped right under a vent. Two team members went to either side while the rest knelt and fixed their weapons on the opening. At Yanis’s countdown they pried off the vent’s grate and flung their weapons inside.
Doesn't this mean the creature put the vent grate back in place?
Edit: the creatures aren't careful at all with the vent grates so this is a tiny oversight here
