How does a man-in-the middle trap create another level of security?

The man-in-the middle trap allows data center employees to trap intruders using trapdoors in the raised floor.

The man-in-the middle trap allows only one person to be between two doors, each with security measures, at a time.

The man-in-the middle trap will not allow a person to exit if they do not have the verbal passcode to enter the data center.

The man-in-the middle trap forces users to spend time in the trap before entering the data center, so only those who really need it will enter.