No pants day

900 New Yorkers, ad hoc performers for un unsuspecting subway audience, participated in the No Pants Day Subway Ride, organised by Improv Everywhere (2008).
As usual, the agents in underpants never break out of character.
Improv Everywhere is a public performance group based in New York City, aiming to cause scenes of chaos and joy in public places. To date, they have caused scenes of chaos and joy in over 85 missions.