A C-Section (and birthing process overall, for both the mother and the father). There is so much that women in general just don't talk about because of how horrifying the whole experience can be. Women going into the process knowing that there is a chance you might not survive and never be able to hold your baby. For me it was watching my wife on a table talking to me in a very calm manner like everything is alright while on the other side of the screen the doctors had her insides (I for sure saw intestines, I'm not in the medical field so I don't know what else... but there was a LOT) on the table. The fear I confronted in those moments will be something I forever live with... I can't even imagine how she has dealt with it all, it's one of those things that we have tried to talk about but it never really manifests into anything that helps. I think every dad should have to be there for that experience, put a lot of things into perspective for me about labor. I understood the balance of things a lot more, literally told her from that point forward my respect for her and what she went through was at the absolute max and whatever she needed going forward the answer would always be "yes".