when I was learning to play poker we had the various hand rankings printed up on each wall so you could just look up to see the order.
This led to an amusing meta where you would see your opponent look at their hand, squint up at the wall and then raise and you knew you were hosed. This then led to bluff glancing at the walls before betting.
This then led to bluff glancing at the walls before betting.
God, I love it when things like this start to develop when playing games with friends. Especially when it's a newer player, or maybe even the quiet person that starts doing it - the first time you catch on to someone pulling a trick like this is the best possible feeling of, "you son of a bitch!"