My Odd Psychological Problem

In my English class, we are reading different books in groups... And one of the groups is reading Farenheit 451. I've read it before, but I don't remember very much about it. Somehow, I heard mention of mechanical hounds in English class, and I suddenly remembered that in that book there were these really creepy mechanical hounds--but I don't remember what it was they did that was so scary. I actually remember that I purposely blocked the memory, and now I'm curious to know what it was. Of course, if I find out, I will want to forget again. It's quite odd actually. Is ignorance bliss? Or should I ask someone who has read it....

-Rebecca

P.S. Everybody's got to post more! (Please)