Having seen several circus acts in Asia in the past few years, I am hard to impress, but I'd have to give "Ka" 2 thumbs up... for the surprise and the wow factor.
-- Ka is different from O in that it has a story line, for those confused, get a copy of the program guide and read about the story first. It will be immensely helpful in understanding the flow of the scenes.
-- I liked the following scenes:
-- drowning in the ocean
-- live arrows and martial arts
-- funny sea turtle
-- 3 D fight scene
-- fireworks
alright, better not give away too much here to ruin your surprises! ^_^
liked it, will consider watching it again in the future.