Cutting machines with high-speed safety systems, and firing subsystems used in high-speed safety systems, are disclosed. A nose extends from an upper portion of the first end and is adapted to engage an upper surface of the building block. First they compute the optical density setting of the lenses for optimal viewing of 2D movies as 3D. A user interface allows a user to insert entities from the library into the process diagram and insert connections between the entities to show logical relationships between the entities. Next, the negative pressure is applied again at time point 166d for a definite period of time.