This is the scene in the Matrix 2 where Neo, Morpheus, and the Key Maker are trapped in a hallway of back doors, one of which leads to the architect. The problem is that if the alarm to the architect's door goes off, the building explodes. This is why Trinity is hacking into the local power grid to shut down power to several city blocks in the Matrix. Keep in mind that this is a special hallway/floor where no elevator or stair well can reach, hence the back door motif.
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