dumbfounding
The vase was dumbfoundingly gorgeous, but I couldn't afford it.
The results from the different groups were dumbfoundingly similar.
This statement is dumbfoundingly outrageous to anyone who has experience of the situation.
I finally realized that the solution was dumbfoundingly simple.
We watched an amazing performance of dumbfoundingly beautiful dancing.

SMART Vocabulary: related words and phrases

Surprising and shocking
against all expectationsphrase
amaze
amazing
amazingly
astonish
dumbfounding
dynamite
earth-shaking
earth-shattering
earth-shatteringly
pull
pull something out of the bag/hatidiom
raise (a few) eyebrowsidiom
reality check
sensationalist
turn-up for the book(s)idiom
unbelievable
walk
walk in on someone
world-shattering