Don't drink and derive. Stolen from : www.damnlol.com/im-texting-with-that-.... LIFE HACK open a beer with your seatbelt while driving. yeah deriving trigonometric functions at 65 mph sounds pretty badass Don't drink and derive Stolen from : www damnlol com/im-texting-with-that- LIFE HACK open a beer with your seatbelt while driving yeah deriving trigonometric functions at 65 mph sounds pretty badass