Possible Clues:

• Duck bound to fly low
• Fly close to the ground gets small mammal almost beginning to panic
• Fly at a low altitude
• Fly at low altitude
• Safeguard against bounce flying low over obstacles
• Get quite down to earth: he has opposite views about Tony Hall's work
• Fly very close to the ground
• Briefly, maybe Sonic Aeroplane's focus is to fly low
• Of plane, fly at very low altitude