after a having too much dairy, beans, or just sitting too long you have to go to the bathroom and instead of nice clean turds you spew out what is known as a "gas/poo complex" - characterized by intermittent clumps of solid logs, tiny floaters, and farts.
i'm lactose intolerant but i couldn't help but eat that pint of ice cream anyway, as a result the next day i formed a gas/poo complex
When you take a poop and one poop released from your anus floats in the water (forms a floater). Then a second poop, partially released from your anus hangs down and touches the poop in the water, thereby connecting the poop in your butt to the poop in the water, and forming a "poop bridge".
I ate a huge salad yesterday and made a massive poop bridge the next day.