So they were going to be studying Kelpie's. Water demons which meant they were probably going to go into the water at some point, Drew just had that feeling. And the Headmaster's question did not help to ease his mind at all either. What would he do? He thought about it for a few minutes also taking into consideration his class mates answers.

"Well my first thought was to cast a leg locker curse so that it couldn't move." He said, with his hand raised. "Of course that's easy for me to say now, standing here in class surrounded by class mates, but my reaction might totally different when actually faced with one." It's all good and well to talk yourself up when you're not actually in danger.