The other day I was preparing for my today's recital of organ improvisations on the medieval Anglo-Saxon heroic poem "Beowulf" where lots of fighting with a monster giant Grendel, his mother, and the dragon take place.
Obviously in this story one of the main companions of the hero is a horse.
How do you depict a galloping horse or riders with musical means?
It works exceedingly well with dotted rhythms.
For example, playing fast-paced repeated chords in the rhythm of dotted eighth-note and a sixteenth-note.
Something like this.
Try it. It's fun.