Stupefaction
/ˌstuːpɪˈfækʃn/
Definition 1 of 1
Pro Tip 1/3Reaction Intensity
Stupefaction implies a strong, overwhelming reaction, stronger than surprise or confusion alone. 
The magician's act left the audience in stupefaction.
Pro Tip 2/3Not Literal
Stupefaction is used figuratively to express a metaphorical 'stunning' of the mind, not a physical effect. 
Her betrayal filled him with stupefaction.
Pro Tip 3/3Unexpected Events
Stupefaction often results from events that are completely unexpected or difficult to comprehend. 
The sudden collapse of the building threw the onlookers into stupefaction.