I'm going to be showing this soon for the sake of it being shown, but Sarah does not actually move anywhere while using this spell. She doesn't see a frozen copy of herself within the virtual timestop, but real her isn't actually going anywhere. Think Fairy Doll rules with a different outcome.
This was one of those comics that I thought was going to be very simple for me to make until I started making it, at which point all sorts of SCIENCE! happened. Going into all the details would be weird and confusing, but I wound up doing experiments with my inking process, and I had to do some damage control on the door details because it was originally way too busy. I mean, it's still busy, but at least Carol stands out against them in this final version.