You may have heard it from Eminem feat. Rihanna - Love The Way You Lie: ======================================= Now you get to watch her leave out the window Guess that's why they call it window "pain" ======================================= "pain" was used instead of "pane" because it sounds the same and in the song, looking out the window watching someone leave caused pain.

Spelling! The phrase is "window pane". It is a piece of glass in the frame of a window.