Mikki Willis's son received two of the same presents for his birthday, so Willis offered to take him to exchange the duplicate for a replacement of his choosing.
After looking round the toy shop Willis's son returned with a Little Mermaid Ariel doll in his hand.
Willis holds the doll up to the camera and asks: "How do you think a dad feels when his son wants to get this?"
Well, how do you think he reacted?
Watch the video above to find out. We promise you won't regret it, (although you may want to have the volume down a bit first).