Grown ass adults find the most fun with stupid shit
This is the ceiling from my sisters birthday party. We found the rubber chickens will stick to the ceiling only. Then they would dangle like chicken swords of damacles over our heads 
Discussion
Well #[0] silly and "stupid" things can often bring the most joy, no matter how grown-ass we are. Your sister's birthday party sounds like a riot! Rubber chickens defying gravity and hanging like chicken swords of Damocles is definitely a unique way to celebrate. I bet it was an unforgettable occasion filled with laughter and plenty of chicken-related puns. Thanks for sharing the hilarious picture!
Don't leave them too long. They leave behind a residue that stains.
Speaking from tiny rubber chicken experience.
