Which monster scared you the most and why?

[reehone]

I would have to say the brute scared me the most. Probably because it was thrown at me so suddenly, I got sort of used to the grunt by then, and thought it was the only enemy. When I saw the brute in the prison, I freaked out. :O
Also, \sounds\enemy\brute\enabled01.ogg will be engraved in my brain forever. I jump a little everytime I hear it in-game.