BioShock: 100% Safe & Easy Way to Kill the 2nd Big Daddy on Hard

Since currently I'm replaying the game on hard, and tbh Big Daddy fights become rather tough imo when it comes to this, thus I'm trying to find some nice ways to defeat those Mr. B's as easily as possible. The video shows how to beat the 2nd Big Daddy without being hurt easily (though I was hit by the turret xD, yeah, but that doesn't count, ^^ lol). Yeah it's a little slow-paced, but for those who struggle with this, it's worth your try to kill him with only one "shot". Occasionally, he may choose to walk back to the upper platform where you first entered the area, so then you won't need to hack the two turrets below. But that's just very random and generally doesn't tend to happen. And that's why you could see I hesitated a while in the vid; that was when I hoped he could get into the trap himself, but he was mean. :)