Fuck off :D

Two men stand in a classroom, one in a dark jacket and the other in a light shirt and dark vest, repeatedly opening and closing a large green chalkboard. The man in the jacket pulls the board open, revealing the writing on the back, while the other man stands to the side, sometimes raising his hand. They repeat this motion in a loop, with the man in the jacket consistently opening the board and the other man reacting by raising his hand. The setting is a classroom with a green chalkboard, a white wall, and a framed picture on the left.