> A single leak anywhere in the tube could potentially cause explosive pressurization [2]. Also search 'vacuum cannon' for what a long depressurized tube can d

> A single leak anywhere in the tube could potentially cause explosive pressurization [2]. Also search 'vacuum cannon' for what a long depressurized tube can do. If the tube ever got breached, the atmosphere would rush into it and propel anything inside the tube like a cannonball.