Bobbi felt a cold chill, which was weird since she was one of the coldest in the school.

"Professor Drake, I really don't think that freezing up the library would be a good prank. Rachel would be pissed at the water damage." She turned looking for the other Cryokenetic...

And nothing there...

"Okay?" She went back the way she came trying to find Bobby, or whatever caused the chill. Setting her books on a table she decided to have her hands free just in case. "I'm warning you Professor I can drop lower than you and I don't like it when someone tries to scare me."