Related Clues:

• Horse's halter
• 'Yikes!'
• Stop
• Rider's 'Stop!'
• Mild oath
• 'Stop!'
• 'Holy smokes!'
• 'No way!'
• 'Awesome!'
• 'Hold it!'
• 'My word!'
• Command to Dobbin
• 'Golly!'
• 'Outta sight!'
• 'Not so fast!'