There are a good many things going on, and Carly for her part, can only take so much. First, she's getting slammed back now. Not Tanyuu's fault, it's the only way out, but it's still jarring. Then, a knife glints behind the bird, and boy! She doesn't want to get hit with that!!

So Carly does the first thing she thinks of...and turns human.

While screaming.

And possibly while trying to dart into the hole at the same time.

considering the forward motion combined with the necessary expansion of the hole, a lot is probably going to continue to happen.