I thought sphere one did this by focusing the car'all without actually "moving" it. That's what I meant by focus anyway o.O
I do think we should know how a fireball is thrown because that changes the effects. Does a fireball in the third sphere hit the target like a burning rock, or does it just heat the target up. That could change the spells uses drastically. Science or not, it is important to know what a fireball can do, IMO.
And yeah, that's pretty much what I said about a third sphere fireball o.-