Tran Misreads his hand

He raises from the button and is called by Andreas Bergen in the small blind.
Flop:



Bergen bets 5000, Kenny calls
Turn:

Bergen bets 10000, Kenny calls
River:

Bergen checks, Kenny bets 20,000. Bergen goes into the tank and folds.
Kenny turns over


"I thought I had a four" he says. Bergen doesnt believe him.