And so I went to try to wake him up and he just wasn't waking up.

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But most business-class beds aren't wide enough for deep sleep because passengers can't change positions without waking up.

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But anyone with difficulty breathing, and particularly young children under age 5 who have bluish skin, difficulty eating, vomiting "that just doesn't stop" or a difficult time waking up should consult their physician, she said.

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It is also important when "waking up" an airplane that hasn't been operational for some time -- such as the case of the Dreamliners that had been grounded for several months.

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"The absolute best thing about all the weight that I've lost is just waking up every day and realizing that I don't weigh 577 pounds anymore, " he said with a laugh.

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One patient mentioned in a Facebook post that he was waking up a lot at night to use the bathroom, which he hadn't shared with Dr. Brar at his physical exam.

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