A horseshoe was a type of shoe that are used to protect horse hooves from being worn out.
When Batman and Robin were approaching Shamon's laboratory in their Batmobile, Simeon Shamon used the magnetism of his Shamon U to repel them backward. Robin then says: "Holy horseshoes!
- ↑ As seen in The Shamon U.
- ↑ As seen in The Shamon 'U'.