Why did this print fail happen?

I’ve printed many of these display stands on all three of my X1C’s, but I had this extremely odd print fail the other day that I’ve never seen before. What could have possibly caused this?

Video

Thankfully, subsequent prints have been perfectly fine but I was just curious as to how this even happened.

My initial thought is a temporary clog caused by debris or a foreign material in the filament.

Either a clog that passed, or something momentarily disrupted the filament feed.

OP, you could try running one of these to ensure that everything is working properly - it really pushes your feed system to the limit, if there’s a transient issue, it’ll show up here.

You also may want to do a cold pull or two to make sure it is clear.

Filament tangled on spool..??

That untangled itself?

To be fair, it could be a coil that was caught and not unrolling cleanly, then it did eventually, but surely not a tangle.