This is a cover of Haunted House using sleigh bells for every instrument. “What a Surprise!” is exclusive to the Final Mix version of Kingdom Hearts II, and plays during enemy encounters in the Christmas Town side of the Nightmare Before Christmas-themed world. The joke is that Haunted House is a Halloween source, but this rip appeared during the Christmas event. The title is also pretty fitting. It feels both genuine (“What a surprise! Haunted House is back!”) and sarcastic (“What a surprise! THIS again!”)