Words for 'confusion'

I am completely stumped, my mind's a-blank, I'm totally baffled.

I'm lost, I don't get it, it's beyond me.

True W, beats me, completely above my head..

Thanks guys, I like them all.

I am perplexed; I am at a loss; I am befuddled; I am puzzled; I am bemused; I can't make heads or tails of it.
I'm sure I could think of more if you wanted more. Do you?

thanks for your tip

maj Could you tell me some adjectives or common phrases that you would use to express deep confusion. Please use them in a sentence. Thanks

"I have no clue".

Slithering confusion suddenly replied to me with a unwilling snarl. It leaned in close, straying,resisting a glance, struggling to get inside my darkest edges of my mind.

http://www.thesaurus.com/browse/confused?s=t