In the Bright City map under Serious Sam Revolutions, I am stuck inside a section of the Sunken Pyramid portion. There is a large room where when you come into the room and stand on or walk over a block stone with a face, this triggers a whole bunch of critters to come out of six sections of the room high up, three tunnels on both sides.

The only apparent way to stop them is to get to the other side and jump on the other stone face on the right upper side of the room. But if you do not get there in time the cage that opens when you stepped on the other trigger close, and the critters start coming again. I cannot get to that part of the room fast enough. The cage top closes in mere seconds.

How do I complete this room? I have been trying for over an hour with no solution. And the more ammunition I use, it is going to fully deplete. And there is no way to get out of the room until I complete this solution in the room! Please help. Thank you.