This bad beat happened a few months ago so there may be some embelishments in the story (so if you're reading Opra please take note

)
The setup... Pokerstars Sit and Go 45 person $5+ 0.5
Final Table I had around 5000 in chips middle of the pack the Blinds at 400 and 200 25 ante.
I had pocket Kings in the late position I raised 3x BB. 4 people called. The flop came.
K
K
A
.
Wow I flopped a Quad. Now most of the people by now were raising aggressively post flop. This time everyone checked. I checked to player on the button, hoping he had
an Ace or raise agressively which he had done several times. My guess was right.
He raised 2000. Everyone else folded. Easy call.
Turn.
A.
Now it was my turn to lead out. I figured he had 2 aces at this point and had a full house and defend it heavily. I raise 1000. He re-raises me all in. Easy call
since I'm sitting on a Quad of Kings.
He shows
A
J 
offsuit....Wooooooot

.
Then my smile turns to horror.....
River
A
just like that I'm out...Stunned I can't believe I got sucked out. I asked him later, if he was telling the truth or not who knows, whether or not he would have called me if had gone all in post flop and he said he would have.