This question brings up unhappy memories.
A few years back I beat 5K players in a step tourney, and then 5K players again to win a $5K buyin to an early NAPT tournament held at the Venetian in Las Vegas. If I remember correctly, there was $4.8 M in the prize pool.
I had been having a decent run on the first day and had about an hour till the day concluded when I picked KK. I was 2 seats ahead of the button and with all limpers I pre-flop raised 9x BB. Got two takers. Flop was nothing rainbow and I pushed half my stack in. One fold and one call. 4th street was blank and the balance went in the middle.
The opponent was Fabrice Soulier. He puzzled it out for a couple of minutes, shrugged his shoulders and shoved. Then he turned over AA, which he had slow played all through.
I did not catch a K on the river.