Hang onto the railing!

A Brooklyn filmmaker documented straphangers’ struggles walking up and down a flight of stairs at his subway stop. As it turns out, one of the steps is slightly higher than the rest, resulting in a humorous — but meaningful — YouTube video.

Dean Peterson’s 1:28 clip, posted Wednesday, shows dozens of people stumbling on a step at the 36 Street subway station in Brooklyn.

According to NBC4, the video has caught the attention of MTA, with crews blocking off the staircase in preparation for repairs.