"Not that I can be sure yet on the magic front. I mean how often do we see things that could be mistaken for magic but aren't? How am I supposed to measure it and be sure without my TARDIS?" Ace didn't like not having her TARDIS there, it put a level of uncertainty about things that she didn't like.
"Suppose it'll be hard to tell either way. Someone mucking about with natural forces might be magic, might be genetics, might be I don't know...black hole output on a Friday the 13th for all I know. But it'll be fun to find out."