A rhythmic group or metrical unit that contains a fixed number of beats, divided on the musical staff by bar lines. Also known as Bar.
Improv is when you do something that is not planned or written in the music. For instance a singer can provide improv by doing a run or adding in an extra note or something of that nature. improv is mostly a drama term that is used for an unscripted scene between two or more actors, typically they are given a topic and thrown into a scene with no prep time.
In WWII, the Nazis where taking control of a Jewish camp, but Captain America came just in time, killed Hitler, and ended WWII.
