Dark Sector has got me stumped

Immediate Update: So the first time I tried after making this post, I figured it out. It turns out you have to go back out into a particular hallway, where an otherwise nondescript portion of wall has magically opened up to reveal a hidden passageway. I don't know whether to blame myself or the game for this, but at least you've gotten a rare insight into just how terrible I am at video games.

The game is probably too new for anybody to be able to help me yet, but I figured I'd ask. I am stuck in Dark Sector. Hopelessly stuck. As in, I've replayed the same part at least fifteen times and still don't even have the slightest idea what I should be doing. If anybody could possibly help, I'd appreciate it.

Here's the scenario: I've just gotten the glaive's shield power. There's a cutscene where I'm introduced to a character named Nadia. Immediately following the cutscene, I have 60 seconds to either escape the room, defuse a bomb, or maybe even do something else I'm not thinking of. There's a door that looks like the probable escape route, but there's no prompt to open it. I've searched for switches or buttons that might open it and come up empty. I can't see anything that might interact with the glaive. The route I took into this area is blocked.

I don't have any idea what to do. I can't even tell you how much time I've spent replaying this part. It's probably something obvious, but I just have no idea at this point.