There is a word for that (who knew?):
defenestration (/dē-fĕn″ĭ-strā′shən/)
noun
- An act of throwing someone or something out of a window.
- The act of throwing out of the window: as, the defenestration of Prague in 1618, when Bohemian insurgents broke up a meeting of imperial commissioners and threw two of their number out of the window, an act which preluded the Thirty Years' war.