Only weirdos can do it with their feet.
Ciel may not mean to cause Noah discomfort or alarm, but I bet she doesn't have anything against the fact that she's doing so, either... Who knows? Maybe he could WISH himself across, HMMM?
It appears that @datren called it, and the "cats" home in on Spirit usage.
See, this is why you should have practiced using your power instead of just lying there and floating Noah.
@Neo's commentary: Truer words never spoken.
Two Monday posts?
I believe this one was simply posted 3 hours early, but is the Tuesday comic.
And yes, the timing for the cats showing up is definitely suspicious, but a cat showed up earlier without any spirit activating, so it could just be bad timing. There are 40 of those things purrading around, after all.