Ah yes, guillotines. Whenever a high volume of people are entering and exiting at the same time, there’s a tendency for the door to spin faster than expected as a result of inertia. When people are entering and exiting small compartments at a high velocity, accidents are prone to happen. Picture a door spinning at constant, typical speed. Let’s assume a high volume of people and therefore constant use of the door. In the time the compartment is exposed to the outside or inside opening of the door the person inside the compartment needs to exit and the person outside needs to enter all the way. If the door were to spin closed before all limbs were inside, someone could easily break an arm or leg.
