Awww, is bunny ok? Make sure he hasn't gone into shock, and keeps eating and pooping ok. I reckon most larger bunnies wouldn't be too frightened by a cat, unless the cat had crept up on the bunny and scared it.
My bunny, Evo, is brilliant, and certainly is not boring. Pain in the a**, but not boring. Video here http://www.pixparty.com/rallybunny/v_8313.asp if you're interested.