Possible Clues:

• Moon landing, notably
• Deed
• Triple flip, e.g.
• Wow
• 12 in each of them, by the sound of it, for achievement
• Juggling nine balls, e.g.
• Remarkable achievement of fate
• Recited pieces of poetry, quite an achievement
• Achievement needing great courage or skill
• Lots of food, but no seconds? That's some achievement