It is an interesting feeling seeing such sophisticated engineering used for this.

The combination of highly developed human brains and such disgustingly underdeveloped human hearts.

There is something undeniably sophisticated in the mechanics of the attack.

Same as when I hear about the CIA 'heart attack gun'. If you don't know, the CIA developed a gun that shot a bullet made not of metal but frozen shellfish toxin that would pierce the skin, melt, and cause a heart attack. A coroner won't test for rare shellfish toxin and may/may not notice a pinprick wound. So it's a gun and you point it at someone and they have a heart attack. There's got to be a part of your mind that admires the ingenuity – and that ingenuity is turned to such malevolent purposes.