Updated Oct. 6, 2011, 12:35 p.m.

Riders at the Foggy Bottom Metro were welcomed to their commute by “escalator 101” signs this morning, warning escalefters to pick up the pace.

“If you choose to use the left side of the escalator you had better be able to make it to the top because nobody wants to wait for you,” the signs read. DCist first reported a photo of the signs at about 10:05 a.m. By 10:45 a.m., the signs disappeared.

Metro did not post or remove the signs and the transit agency does not know how they appeared, spokesman Dan Stessel said at about 12:15 p.m.

The signs also told riders to use elevators if they have heavy objects or strollers and to continue walking once they get off the escalator at the top.