From Abu Zubaydah's testimony:
I was then made to sit on the floor with a black hood over my head until the next session of torture began. The room was always kept very cold.
This went on for approximately one week. During this time the whole procedure was repeated five times. On each occasion, apart from one, I was suffocated once or twice and was put in the vertical position on the bed in between. On one occasion the suffocation was repeated three times. I vomited each time I was put in the vertical position between the suffocation.
During that week I was not given any solid food. I was only given Ensure to drink. My head and beard were shaved everyday.
I collapsed and lost consciousness on several occasions. Eventually the torture was stopped by the intervention of the doctor.