that's nasty, okay? >> gregory gadlin has his own technology. uses a distinct knock to call his downstairs neighbor to the bowl. >> i got one knock like this. it go -- >> and while most inmates scoop the water out, gadlin uses a makeshift plunger. >> flush, wait a minute and i'm -- i use my mattress, and it's kind of crazy, i would have never thought until i was taught. but this is how i do it. take it, i go like this. i put it over here. right? and you know the pressure, it makes it go down. so -- it's pushing the water down and out like little tubes down there. grab a couple things so my head won't be all the way in the toilet and i get down like, like a little microphone and just be like, what's happening? you feel me? just talking like that. >> hello?