I was just reading dungeon threads, and noticed that most people think that hitting titans nape is certain kill.
Well its not. Its the only known way to kill it yes, but the cut MUST be deep enough.
1st - on the training Jean mentioned that he didn't cut deep enough to kill
2nd - MINOR SPOILER - using a wood choping axe Sasha couldn't kill titan so small that it wasn't much higher than she is. He just ignored her as his wound healed between every chop.
So basicly either you one hit a titan or you dont kill it at all.
Thats all I wanted to say.