Astounded was created in 2001-05.
I was astounded by the special effects in the film.Her comment astounded me.
I'm astounded!
"He was astounded by the firey red flames."
stunned
"It will blow you out of the water" is a phrase used to express that you will be astounded. "It blew me out of the water" then would mean that I was astounded.
It doesn't have one.
Her rudeness astounded him.
astounded
astonished; awed; overcome; overwhelmed
The magician's sleight of hand trick astounded the audience with its flawless execution. The team's unexpected comeback in the last minute of the game astounded their fans. The scientist's groundbreaking discovery astounded the scientific community.
The callowness of the young man astounded me.
The correct spelling is "flabbergasted" (astounded, awed).