A scene from the episode "This Side Of Paradise". Everyone was infected by spores from plants and wanted to stay at the planet, doing just love and peace. A very haunting scene of a Kirk all alone on board and nobody there anymore. He finally realized that strong emotions were what snapped people out of it so he tried to make Spock angry. It worked better than he had planned. Shortly before he smashed the chair into Kirk thankfully Spock realized what he was doing and stopped.
You can watch the scene here:
https://www.youtube.com/watch?v=wY9NkYGUEyE