Trivia: The title track to the movie, which plays at the menu and twice in the movie, is "I'm Shipping Up to Boston", a hit song by the Dropkick Murphys. The Dropkicks are a Boston-based Irish band, fitting for a movie about Irish mobsters in Boston. The song is also the entrance music for Red Sox closer Jonathon Papelbon.
Question: The character Mr. French pours a clear liquid out of a clear bottle before using a gun to shoot through the bottle and kill a man. Leonardo watches in disbelief and Mr. French then slaps him and tells him to: "wake the f**k up!" What did Mr. French pour out on the floor? What was the point? He just pours this mysterious liquid on the carpet, shoots a guy, the walks out. Help?