The problem is a little vague, but I would suggest deconstructing the corner- figure out what led you there, and what you could do differently.
The thing about 'pantsing' is that you often don't notice when you occasionally make a random decision: like, deciding something should happen because it's just really cool and you want it. ^^; It gets mixed in there with all the other more grounded ideas, and then, if you eventually get stuck because of it, it can disguise itself as a wall that you have to overcome, like "no, THIS needs to happen too; I can't just write it out."
Can't you, though? Look closely.
Oftentimes there ARE other options besides that one 'really cool' idea, but you've stuck with it and held it as canon in your head for so long that you never considered them. Now is the time.
I recently had to do this with a novel...halfway through the first act, I realized that the age of the company the characters worked for and the recency of a certain event didn't match up correctly. Only once I realized that the company could have reasons for existing before the event (rather than being founded because of the event, a 'cool idea' I'd had since the story's conception) did I dig myself out of that hole.