When I think of walk up music it has to be where the opening riff of the song is instantly recognized, profound and high energy. So The Blue Danube would not work even though it is one of the most beautiful pieces ever written. So for classical pieces, Beethoven’s 5th intro or The William Tell Overture would work.
Same for Rock. It has to grab the listener. Lots of songs by AC/DC have great power intros with my two favs being Back in Black and Highway to Hell. When my iPod turns on in my car, it always starts with the first song, AC/DC’s Shoot to Thrill, because they are alphabetically first on the list and it was the first song loaded. So I may pick that one too.
Rock has so many songs that have great power intros, their are too many to name.
See R6.3c for wrong ball. (You use the term opponent which suggests match play.) The penalty for playing a wrong ball in match play is loss of hole.