I know most of us including me feed frozen thawed or pre-killed but does anyone feed live?

I'm only asking because I was told this snakes hit hard when they go to grab there their food so i was wondering if anyone knew about them doing stuff like hitting a live rat so hard they like broke its neck or something..

I'm just curious. i'm going to stay with pre - killed for my Blood. so lets not make this a debate thread lol..thanks