the guy broke a chair on allen's back and broke a few ribs so this is just him passing out from that regardlessHow did he die from such a non-fatal stab wound like that!? It's not like the sword went the other end and it's nowhere near any noticable major organ nor did it hit the spine.
Only the tip of the sword went in. At most he will bleed but as long as they keep the blade in, until treatment he shouldn't die from blood loss, since the sword is in the body and should stop the majority of the blood from spilling out.