Related Clues:

• Cow, perhaps
• "I'm in __": "Wow!"
• Prompt jaws to drop, say
• Move a whole lot
• Rock loco rolled over
• Reverential regard
• Open-mouthed state
• Thunderstruck feeling
• Stunned wonder
• Reverent astonishment
• Stagger with small barrel
• Knock unconscious
• Shock, when daring manoeuvre is cut short
• Stupefied admiration
• Reverent fear