Zubaydah drew himself being waterboarded by CIA interrogators. He was tortured in this manner 83 times.
"They kept pouring water and concentrating on my nose and my mouth until I really felt I was drowning and my chest was just about to explode from the lack of oxygen," Zubaydah told his attorneys in 2008.
The detainee said he had his head repeatedly banged against the wall and was dragged with a towel around his neck, causing bleeding. He also said he was slapped in the face.
One of the psychologists contracted by the CIA to devise the torture techniques has said walling was used to disorient and "discombobulate" the prisoners.
Zubaydah drew himself shaved and shackled to a chair with a bucket underneath it and a bag over his head.
Zubaydah was subjected to sleep deprivation techniques that involved painful shackling and being doused with water.
The detainee said he was subjected to sleep deprivation in some cases for two to three weeks at a time.
"It felt like an eternity, to the point that I found myself falling asleep despite the water being thrown at me by the guard," he said in the Seten Hall report.
He was forced into a small box and shackled in the fetal position.
Zubaydah said he spent "countless hours" tied up in the fetal position inside a small box, which caused him intense pain.
"As soon as they locked me up inside the box, I tried my best to sit up, but in vain, for the box was too short. I tried to take a curled position but to no vain, for it was too tight," Zubaydah said in the Seten Hall report.