Losing sleep is no joke - sleep deprivation can lead to mood swings, hormonal changes, memory loss, and straight up hallucinations.
Normal interactions can get surreal very quickly when your brain is lacking sleep, and the tasks you normally crush at your job can turn into nightmarish obstacle courses. Which is to say, we should all go to bed earlier and prioritize sleep when possible, because when it goes to the wayside our minds unravel.
In college, I tried to hold down a donut delivery job while taking a full credit load. I got up at 4:30 AM to deliver, and often was up until midnight or even later. After a particularly busy week with almost no sleep, I hallucinated a man crossing the street right in front of me while delivering and I slammed on my brakes to avoid hitting him.
When I realized that there was no one in the crosswalk -- and no one anywhere in sight -- I finished my deliveries and immediately quit my job.