intent
"Stunning" suggests that one's appearance is so extreme that someone who looks at him/her is struck senseless for a moment...stunned.
She was stunned by his response.The officer stunned the suspect with his taser.
Stunned is a verb (past tense of stun) and an adjective (a stunned expression).
I am stunned by your disgusting request!
I stunned people with my colorful clothes.
stunned does not occur in the KJV Bible
I was stunned by the score I got on my test today.
A bunny will not generally get stunned if you take a picture of it with a flash. They may get scared and freeze momentarily, but they are not stunned in the the classic sense.
Example sentence - We were stunned to learn our lottery ticket was a winner.
Yes, "stunned" is the past participle form of the verb "stun."
Past tense of stun is stunned, as in, "That terrible news stunned me."
Kamau's parents were stunned to see him because they thought he was dead.