What happens if a player has more than 10 cards?

Anytime a player has more than the maximum 10 card hand size they must immediately discard down to 10. A player may not play an Action card in attempt to reduce the card hand size.

Soda Fats: Maximum hand size with Soda Fats is 20, and anytime a player has more than the maximum 20 card hand size with Soda Fats they must immediately discard down to 20. A player may not play an Action card in attempt to reduce the card hand size.