matt and carter trot toward corridor six.
matt running, checking over his shoulder. sounds of footsteps behind him, but up ahead the heavy metal blast doors begin to close.
frank and sarah, holding their tranq pistols, fly down the corridor.
matt and linda push along the corridor; matt spraying with the fire extinguisher in short controlled bursts, linda clutching her tranquilizer like a commando.
linda and matt move as fast as they can. they reach the burned out elevator. what the hell are they gonna do? we know the damn thing doesn't work. she swings her crowbar at the ceiling. the maintenance hatch comes down.
the explosion rips through the lab doors. a massive fireball rolls down the tunnel swallowing everything in its path.