KWELI WAZUNGU HAMNAZO, HEBU ONENI VITUKO HIVI....

Cold? Yes. Pants? No way.

People take part in a No Trousers Day 2013 flashmob on the London Underground, in London, England, Jan. 13.

A rider on the New York City subway.

Thousands of subway, train and bus riders stripped to their skivvies on Sunday as part of a worldwide “pants-free day” hosted by improv groups.
Pants-free days were launched in 2002 by Improv Everywhere in New York and have since taken off (literally). The rules are straightforward: Take off your pants, maintain a straight face, wear non-offensive* underwear. (Also, pay your fare.)
In Seattle, where Emerald City Improv hosted its third “No Pants! Light Rail Ride,” in 37-degree weather.
The improv groups ask that the pants-less remain in character, walking around their cities as if not wearing pants is completely normal.
*About that underwear: Emerald City Improv specifies: No thongs, jock straps and see-through briefs, among them.

Participants in the annual 'No Pants Subway Ride' transfer to another train at a subway station in Mexico City, Jan. 13.

Passengers react to participants in the fourth annual 'No Trousers Tube Ride' on the London Underground.

A soldier takes off his pants while riding the subway on Jan. 13, in New York City.

Passengers at a subway station in Mexico City.