Related Clues:

• Greatly impresses
• Blows one's mind
• Tiers in a building
• Doesn't just grab
• Defibrillator output
• Leaves slack-jawed
• Leaves dumbstruck
• Stumps (with question)
• Knocks person down in a fight or confounds
• Jostles; shocks
• Greatly surprises
• Storeys
• Wows, and how
• Building levels
• Blows away, so to speak