Sebastian Stan Flashes Bare Butt on Street to Promote New Movie 'Monday' Movie 'The Falcon and the Winter Soldier' actor posts an NSFW photo of him going pantless while holding his coat open and facing away from the camera in the middle of the street. Apr 13, 2021 Sebastian Stan is getting cheeky to promote his new movie " Monday". Trying to draw people's attention to his upcoming film, the actor took to Instagram on Monday, April 12 to post a picture of his bare butt. In the NSFW image, the Bucky Barnes a.k.a. Winter Soldier of Marvel Cinematic Universe wore nothing but a coat and sneakers while posing in the middle of an empty street. He faced away from the camera while holding his coat open underneath the streetlight.