Yeah. In my first year of drug abuse, took tiletamine (it was advertised as dissociative so I thought it'd be somewhat similar to ketamine, it's actually a veterinary anesthetic that probably shouldn't be taken by humans). One pill, and then darkness. Woke up having terrible hangover, unable to stand up, crawled on floor with great effort and checked my phone. Realized almost 2 days passed. And that the substance is all gone, though I only remember taking 1 pill out of 5 or so. I'm pretty sure I took all others after that one, unable to recall because of amnesiac effects. I also remembered that in the middle of the darkness I woke up for several seconds, turned on the side and threw up, then fell into darkness again. Good thing my body did it, otherwise I'd probably choke on vomit and died.
It was frankly one of the worst experiences in my life. It's scary for me that I don't remember how and why I did it, why I took these other pills, what I was thinking about at this moment. It's like.. just happened and I "wasn't there".
Also because I didn't intend to kill myself or anything, but it looked exactly like this from others perspective. It was hard time in my life and things just started to get better, but because of this episode I could (and thought I will) lose the good things that kept me motivated to live on, and then repeat something like this but with actual suicide intention lol. That's how i accidentally nearly ruined my life and almost died. But this episode made me far more cautious, aware and less impulsive - don't want to ever again find myself having irreversible life-threatening things done in blink of an eye.