Claus Nielsen eliminated on the river

With a board of [10d6h4h]. Claus Nielsen and another Player got all the money in the middle (9000 each).

Nielsen shows pocket 4’s for a set of 4’s.
Player shows 10-6 for top twp pairs.

The turn comes a harmless [Qc], but the river is a disastrous [6d] that gives Player a full house (6’s full of 10’s) thus eliminating Nielsen.