What do Spock and McCoy know about torpedo programming?
Spock is a science officer, McCoy is a doctor. So what exactly are their qualifications for performing "torpedo surgery?" But I suppose I shouldn't be surprised. After all, this is Star Trek, where the senior officers on the ship do pretty much everything, including the most basic grunt work.
Also I love how after the torpedo is fired, the crew of the Klingon ship just stands there and blankly stares at it without attempting any type of evasive action. It seemed like they had enough time to at least attempt to get out of the way.
It's as if the moment the torpedo is fired, the Klingon ship just gives up.