Caution: This video, although very interesting, is not for the faint of heart.

Watch this video courtesy of National Geographic and see how quickly a rat can go from the city streets to your bathroom.

A rat‘s ribs are hinged at the spine, enabling it to easily squeeze through the tightest spaces—like the pipes draining your toilet. And rats are great swimmers too; they can hold their breath for up to three minutes.

rat in toilet