This was more saddening than the last episode because of that flashback to the last episode.
Kiritsugu was forced to shoot the plane at an extremely high altitude to kill the wasps for sure. That's probably why he did it in the air as opposed to it landing.
Only a few episodes left! This is far better than Fate/Stay Night, and UBW. (UBW was good, but it was way too rushed. They should've did like 10 40-minute episodes Imo.)
Edit**: At this point if someone were to jokingly jump out of the bushes and say,
"SURPRISE IT'S NOT REALLY KIRITSUGU, IT'S EIREI EMIYA"
I'm not lying when I say, I'd almost believe that wholeheartedly. The similarity between the two at this point is uncanny. That's a good thing.