• That show workers reported the singer was talking to himself and repeatedly saying that "God is talking to me."
• That Jackson was suffering severe chills on a summer day in Los Angeles and his skin was cold as ice to the touch.
Jackson lawyers revised the question Friday morning after AEG Live lawyers objected to the information about Murray's nightly propofol treatments, since it was derived only from the doctor's statement to police after Jackson's death. The judge previously ruled that statement inadmissible.
Instead, they brought up evidence that Murray ordered more than four gallons of propofol between April and June, which Czeisler said equaled 155,000 milliliters of the drug. An anesthesiologist uses between 20 and 30 milliliters to induce a coma for surgery, he said.
The expert testified that his review of Jackson's medical records convinced him that the singer suffered a chronic sleep disorder that "was greatly exaggerated" while he was on tour or preparing for a tour.
Jackson died just two weeks before he would have traveled to London for the premiere of his "This Is It" comeback concerts, produced and promoted by AEG Live.
A lecture on sleep
Jurors appeared quite interested as Czeisler lectured them Thursday on his sleep research, including an explanation of circadian rhythm: the internal clock in the brain that controls the timing of when we sleep and wake and the timing of the release of hormones
"That's why we sleep at night and are awake in the day," he said.
Your brain needs sleep to repair and maintain its neurons every night, he said.
Blood cells cycle out every few weeks, but brain cells are for a lifetime, he said.
"Like a computer, the brain has to go offline to maintain cells that we keep for life, since we don't make more," he said. "Sleep is the repair and maintenance of the brain cells."
An adult should get seven to eight hours of sleep each night to allow for enough sleep cycles, he said.
You "prune out" unimportant neuron connections and consolidate important ones during your "slow-eyed sleep" each night, he said. Those connections -- which is the information you have acquired during the day -- are consolidated by the REM sleep cycle. Your eyes actually dart back and forth rapidly during REM sleep.
"In REM, we are integrating the memories that we have stored during slow-eyed sleep, integrating memories with previous life experiences," he said. "We are able to make sense of things that we may not have understood while awake."
Learning and memory happen when you are asleep, he said. A laboratory mouse rehearses a path through a maze to get to a piece of cheese while asleep.
The area of a basketball player's brain that is used to shoot a ball will have much greater slow-eyed sleep period since there is more for it to store, he said. Players shoot better after sleep.
The Portland Trailblazers consulted with him after they lost a series of East Coast basketball games, he said. He was able to give their players strategies for being sharper when traveling across time zones.
He's worked with the Rolling Stones on their sleep problems, he said. Musicians are vulnerable since they are often traveling across time zones and usually "all keyed up" to perform at night, he said.
Czeisler developed a program for NASA to help astronauts deal with sleep issues in orbit, where they have a sunrise and sunset every 90 minutes.
Other clients include major industries that are concerned about night shift workers falling asleep on the job, the CIA, the Secret Service and the U.S. Air Force, he said.
Jackson lawyers argue that AEG Live should have consulted a sleep expert like Czeisler for Jackson instead of hiring Murray -- a cardiologist -- for $150,000 to treat the artist.
The trial ends its eighth week in a Los Angeles courtroom Friday. Lawyers estimate that the case will conclude in early August.