Hacked sack - You shoot your cum from your tip into your belly button, and

You shoot your cum from your tip into your belly button, and if you make it in, a tiny bell rings like you just won a prize.

I did hacked sack and the bell rang like I won a million dollars.

My friend did hacked sack and it sounded like a cash register.

I did hacked sack and my belly button was full of cum and magic.