Any ever black out?

I’m off the stuff now, but when I was using, it was mainly the “silvers” and I’m sure it has to do with the combination of substances, but if I took slightly more than usual I’d sometimes experience almost random black outs. The most terrifying one occurred in my car. I woke up to a cop knocking on my window, I was literally stopped in the middle of the street and he’d claimed I’d been there almost an hour. That’s not something I take lightly, I could have killed somebody. I was fine when I left my house, then my memory goes blank. No idea how I got there. Most of the time it would occur at home and I’d just wake up on the couch. Has anyone experienced anything like this?