Related Clues:

• Vault (over)
• Quantum event?
• Quantum follower?
• Try to make it over a chasm, say
• Look follower?
• Mimic a kangaroo
• Flaw in logic
• ". . . one giant ___ for mankind"
• ___ year (period of 366 days)
• Hurdle (over)
• Look before you ___
• Start a bungee jump
• Jump into a pool
• 'Look before you ....'
• Spring suddenly