I have had one glitch-in-the-Matrix moment that comes to mind. A few years ago, I was sitting at my desk at work. Behind me there was a large window sill with only one thing on it, like a little bowl or something. I was holding a pen and put it down on the window sill and turned my back to it for a second. I looked back, and it was gone. Seriously. Gone. I even laughed to myself that I knew it was supposed to be there and studied the window sill for a moment. I shrugged, and turned back to my desk. A moment after that I looked at it was there again.
I don't know if it was God, a ghost, Morpheus or Keebler elves. Don't really care. Just thought it was funny and weird.
I did have an odd thing happen, at least inside my own brain, this past Sunday. I went to a convenience store and then to my sister's house. At my sister's house I realized my wallet wasn't in my back pocket. I thought through my morning. I remembered, vividly, walking into the convenience store and sticking my right hand in my pocket and finding two one dollar bills (from wearing the pants the day before). Wanting to keep my bills together, I pulled out my wallet, and put them in there.
So, after spending time with my sister, I drove back to the convenience store to see if I'd left it on the counter. I retraced my steps, talked to the people, but nothing. Drove home. In my house I kept thinking about it. I stuck my right hand in my pocket again. There were the two one dollar bills. I then walked back to the bathroom and found my wallet where I'd left it the night before.
What I realized was that when I was originally at the convenience store, I'd reached for my wallet but having not found it, I put the cash back in the pocket. I did all of this in a rush so I wasn't really thinking about it.
The point of that very boring story was that my mind fully manufactured a memory of something that never happened - putting cash in my wallet while walking into the convenience store.
Again, I don't know what to chalk it up to. Probably most simply explained as Sunday morning a hangover.