ridiculous

to be amazed

to be utterly amazed

to be flabbergasted

look of amazement

astonished beyond words

to be dumbfounded

laughing in astonishment (at something silly or stupid)

dumbfounded

dementia

senile dementia

dementia praecox

dementia

a (single) reading (a perusal) leaves one dumbfounded

senile dementia

paralytic dementia

dementia pugilistica

stupid chatter

fools use people to pick up things lying at their own feet

only a fool with no manners asks for another helping more than once

fools act without thinking

you're a fool if you dance, and a fool if you just look on; we're all fools, so let's dance

dementia praecox

(I'm) shocked