Okay, so I was at the part when you've just got the one resonance doodad thingy from the hospital basement, and you go outside and see the news report on the usually turned off TV. After that, the two guys decide to rush up to the roof ASAP.
However, the gate in the wire fence was padlocked, and so they did what anyone would do in that situation if they were taking part in a glitch, and teleported through the gate and across the ground beyond it so they appeared by the door to the crane. Then the scene ended and they came out on the roof.
I'd guess that an animation just didn't play if it wasn't for the fact that the gate was padlocked (and remained padlocked after they teleported, with no one mentioning it). Were you meant to have opened it earlier in the game, and I somehow progressed without doing that?