Corrected entry: While in the tunnels under the cemetery in Moscow, walls rise up from the floor blocking the parties' exit. Shortly after that, rows of blades swing out perpendicular to the walls. The blades can be seen vibrating as if they were made of rubber.
Larry Koehn
18th Apr 2004
Correction: The blades have some mechanism that allows them to extend or retract. It is this aged and imperfect mechanism that is causing them to bounce a little as they settle into the new positions, not because they're made of rubber.
Phoenix