Related Clues:

• Knocks for a loop
• Throws for a loop
• Knocks the socks off
• Surprises
• Amazes
• Unnerves
• Knocks silly
• Knocks out
• Dazes or dazzles
• Flabbergasts
• Renders senseless
• Cold-cocks
• Dazzles
• Astonishes
• Gives an electric jolt