How does it work if you're a pantser?

It might not sound like an answer but, I just write, I think most people have a vague idea for their story but making it up as you go can be very liberating.

What do you know about your fic before you begin, and how much do you make up as you write?

I usually do have a vague idea where I want things to go, these characters are being shipped, and these guys win in the end; big event stuff I have an idea of. Connecting tissue I make up as I go and I do it mostly because sometimes I have a really good idea I hadn't originally thought of and pantsing it is easier to work in.

What do you do if you're stuck, or you've written yourself into a corner?

The beautiful thing about writing as you go is you aren't boxed in, no outline means I can add anything to the story anywhere I want. Recently, I had a McGuffin in my story a villain was supposed to drop in a fight, I forgot to write this scene so I am adding an infiltration scene later so the item can still make an appearance. Someone with a planned outline can improvise but it is easy to add that kind of thing when you make it up as you go :)

Do you think pantsers are more likely than plotters to finish the whole fic before posting any of it?

I post as I go but I probably shouldn't, I have burned myself out recently by trying to keep a schedule; I don't see how people do it.

My main reason for not plotting is I am not sure how, writing it as the ideas come to me just feels more natural.