can anyone tell me why this is

[imgrowing]

1 branch is doing this and 1 only, kind of worried whatever it is might spread.
almost 4 weeks into flower with og kush in gaia green organic soil.
fed gaia green 4-4-4 and 2-8-4 at 25/75 4 days ago. every other leaves look great.
these pics are from the same plant and side by side branches.
notice the leaf edges on 1 compared to the other

 

[GoldenDragondnw]

Whoa. That's crazy.

 

[imgrowing]

nobody has any ideas?
i'm leaning towards just a weirdo branch as all the others look good.

 

[GNick55]

that plant closest to a fan?
is the whole plant smaller than other plants?

 

[imgrowing]

that plant closest to a fan?
is the whole plant smaller than other plants?

it's actually the biggest girl and i have reciprocating fans.
it's just 1 branch doing this.
they have 5ish weeks more into flower and was wondering if this was an issue and if so how to fix it.
thanks for the response