He bet half pot or so on the river after raising the turn. I think he did a good job of applying pressure and not making it look like an out right steal, it looks like the large side of a value bet against an opponent that thought he liked his hand enough to take it all the way down to the river. The half pot river value bet is where I start trying to steal and move up and down according to each opponent. It is also possible that UTG had KT 67 98[h] or something and Kalle had the best hand all along or after the turn.

Usually you don't want to bluff when there is a decent chance your hand is good. Furthmore, if your hand is not good, you need to raise enough to make sure the likely hand your opponnent holds will fold. One of his most likely hands was a weak ace, and I'm not sure that bet gets it to fold.

one technique ive used to improve my game was taken from one of dan neg. articles.
the basic idea is to play at a lower limit, one where you can afford to lose a buy in if things dont go well and chalk it up to a learning experience.
then you proceed to play like a complete maniac and bluff as often as you think it will possibly work, and get every ce3nt of value, without regard to anything other than winning the pot and getting full value.
you cant play but so low to get any value at all because the players do have to think somewhat. i play the 25 or 50 buy in nl but use your discretion.
this is not exactly what dan neg. suggested but my modification of his idea.
the great thing about it is how much it will help your hand reading and feel for the game.
oh yeah and its also a real kick!!! lots of fun and it hasnt cost me anything (i actually manage to make a littlt)
it illustrates some interesting things while you play and should start to open your eyes to profitable bluffing possibilities. everyone at the table will think you are an uber fish but you can still outplay them and win a little (not as much as if you toned it down a bit)
matty