Improv Everywhere went underground for their latest mission, turning an ordinary subway car into a moving photo studio. The public pranking comedy group claimed the MTA had hired them to photograph commuters for a straphanger yearbook. Despite the absurdity of their purported plan to shoot the millions of New Yorkers who ride the subway daily, they reportedly had no trouble convincing people on the 6 line to let their guard down long enough to pose for a portrait. Watch ideo of the “Subway Yearbook Photo” stunt after the jump.

Photos via Improv Everywhere