Erron Black's round win animation consists of him taking a coin out of his pocket, flipping the coin, and then putting it back. However if you hold Up while this happens, he will toss the coin at his opponent and say "Keep the change".

This Easter egg was hinted by NRS senior designer Aaron Davis back in October 2020 and it wasn't discovered until February 2023.
Contributed by ZpaceJ0ck0