Related Clues:

• Daring deed
• Explosive experiment
• Bomb trial
• Explosive trial
• Bikini blast, briefly
• Potential Guinness World Records entry
• Noteworthy achievement
• 'This is only ___'
• 'This is only --'
• Blast from the past?
• 'This is ___ …' (radio announcement)
• Remarkable deed
• Heroic deed
• Notable exploit
• Treaty topic