I would'nt say it's not difficult but very possible.I can't ...Yet.
Maybe I'll never be able to.
There is that little change in between my ears when I'm say -5 after 6,or -4 after 4.
the last 3-4 holes are usualy pars.And no ; it's not wgt's fault ,but entirely mine.
It's almost has if I'm expecting it,"Ok 3 birdies and an eagle to start this round,I'm holding on to the mouse a little tighter,talking to myself,don't screw it up "and Bam,missed the ding,and astring of pars to finish with 31.
It all has to do with the mental,if you can make 5 birdies in a row,why not nine?
Those who shoot 26's and 27's on a regular bases don't flinch under pressure.