What is the time you were the most amazed by something you saw in poker? A time you said Wow! Or something stronger.
For me it was a home game of "dealer's choice." One of the regulars often called a game of draw, house rules of two draws of up to two cards. But with a change to the usual rules. If you were staying to the final showdown, you had to draw at least one card on the last draw.
So he dealt out the five cards for everybody, looked at his hand, and on his turn folded. But he said he was carefully putting his five cards aside until the end of the hand. Then he did his task as dealer until the end of the hand.
After the hand was decided and the pot collected, he revealed the five cards he had folded. He had a Royal Flush. He had dealt it "pat" to himself. But his rule meant he had to toss at least one card in order to stay in until the end. So instead of busting his RF, he preserved it to show us. It was the only RF he had ever been dealt. And his own rule meant he could not play it.