Dave, yeah be more careful, but you could have easily survived 100iu as long as you realized your mistake or didn't ignore the warning signs of going hypo.
I know, lived with, was there, when a close friend injected 180iu's thinking it was 18. Lol we found out because I asked why he was throwing away 2 syringes. it was a close call be we just kept liquid carbs going down him and he was fine. Had some nasty GI stress but that was about it.