Why it worked
The video likely worked due to its unexpected and humorous subject matter, playing on the visual of a person appearing disproportionately large on the back of a motorcycle, combined with a playful caption that invites engagement and amusement.
Summary
The video shows a person riding on the back of a motorcycle on a highway. The rider is wearing a pink helmet and denim shorts, and the caption humorously refers to them as a "giantess". The perspective is from another motorcycle following closely behind.