Bella sheilded herself with a sheild charm aswell as the spell came at her. She felt it hit the sheild, it was a bit weak. Bella did some quick thinking. She didn't really know any proper good spells that would make her win immediatly, she'd have to wait for 5th year for that...but there was a spell she'd read about in library...she'd practiced it, but she was still abit weak. She only knew it from a book. It probably wouldn't work, but it was worth a try, what did she had to loose? "Petrificus Totalus!" She shouted, then realised she knew a much better spell than a body binding one. She looked down at her wand. Nothing. Great. "Petrificus Totalus!" She cried again, putting all her effort into it; wanted the girl to bind; wanting it to work...nothing. 3rd time lucky. "RICTUSEMPRA!" she cried, changing her mind at last minute. A tickling charm would be a funny one to watch. If it worked.