Crazy fan leaf

Yep, in 40 years of growing, have seen all sorts of weird and wonderful mutations, including buds growing on leaves, buds growing on leaf stems, multiple leaves like this one, strange branchings.............nothing really surprises me anymore! Cannabis is a truly magnificent plant!

the twisting part was probably because it was shaded from light and possibly phyiscally imposed upon by something. Are one of the fingers growing out oddly? like a 2nd layer of fingers? that's just a mutation of some sort. no big deal. any congestion caused by how it was growing out could be part of what you see. any twsiting further out from that congestion would be from trying to find more light.

These are two tangled leaves, look at the stem, it's double. If you look at the plant where you removed the leaves, a branch must have suddenly split in two. I call it a Siamese plant, but I've never found any documentation on the phenomenon.

You should left it. Would have small nug at end of harvest on that leaf. Looks funky ;) Common mutation. Nothing special, had not once or twice in begining of grows, later - never. Used bluepurples, maybe that was reason, think it was first generation of Mars, had like 4 leaves from different strains in a time of a year or so.

No PGR's

That is indeed a weird leaf. Are you using any PGR's?