european young man is greatly surprised and opens his mouth in astonishment

european young man surprised astonished amazed shocked astounded openmouthed gaping wonderstruck stunned startled flabbergasted bewildered dumbfounded speechless thunderstruck awestruck wideeyed gobsmacked incredulous impressed flummoxed dumbstruck overwhelmed fascinated stupefied disbelieving puzzled dumfounded captivated struck mesmerized awed dumbstricken nonplussed agape agog jawdropped