Archibald spends five minutes boasting about the defenses he's erected on the entire floor, claiming nobody would to bypass his thousand traps, etc... and Kiritsugu just blows the whole building up
That was that infamous Indiana Jones scene x100. Too bad the asshole most likely survived. He is going to be so pissed, haha. I hope his assistant will mock him again.
My second favorite part of the episode was Gil and Kotomine's little chat. Those two get along surprisingly well all things considered.