You can see that Jim's been building rollcages for at least 100 years. We can appreciate a rollcage as a work of art when done right. This is the beginning of the driver "compartment." Just by this photo you can see that the cage is rigid-and that's even without the X-style door bars in place, added after this photo. Built to 25.5 specs, the cage makes the car feel like one solid, rigid unit; naturally, it protects the driver.