Donner-Octavio, Troianescu, Wageningen Zonal, 1957

Hey everybody - yet another of my Wikipedia tangents led me to the page of Jan Hein Donner.  I am new to chess playing even somewhat regularly and recognize practically no names, so if this game is famous or obvious, bear with me.

It was noted that the following game, Donner felt, was one of his best:

So why 26... Kh8?  I can't help but see the grandmasters as infallible champions, recognizing any outcome 20 moves in advance, so I'm sure there must have been a good reason, but unless I'm missing some obvious reason for not doing so, I can't see why Octavio didn't play 26... Rxf7.

After 26 ... Rxf7 27 Rxc8+ Rf8 28 Rxf8#

Oops.  Well, given that embarrassingly simple solution, let me ask a different question.  Were there any moves in this game that made it stand out to you as being particularly surprising or awesome?  What sort of things can I expect to differ between a game like this and a game between two players ranked 1300?

I had to look at the game a couple of times to realize how epic it truly is;  Both players were only a move or so away from mate but white beat em to the punch.