This episode as I understand it saw the origin of the Vulcan neck pinch because Nimoy felt it was out of character for Spock to hit the evil Kirk on the back of his head (in engineering) with the base Spock's phaser grip.
Spock's awful comment on the end
The most likely explanation that I've come up with that make sense of what Spock said is if Spock and Rand were actually very close friends, it was exactly
the kind of comment that one girlfriend would make to another following something bad happening to one of them.
Spock and Rand are "girlfriends."