I've come close several times. The worst time was about three years back. i was so exhausted that I climbed in the last truck at the job site to leave in the evening and I literally couldn't remember where I was or how to get back to the shop. I got lucky. The first stop sign I came to was at a street that ran a couple of blocks from my house and then it all came back to me. That was a different job than I have now.