Possible Computer Glitch or 5D Moment

I was doing research on a class I was taking at my university and I remembered seeing the words on my computer screen moving. This does not happen all the time but every other time I am on my computer the words would just started moving. I do not take any drugs or any other substance that can manipulate my perception of reality. But I just noticed that pattern and I wanted to know whether anyone had a similar experience where random things would start happening. I do have other experiences but they are pretty wild but I wanted to start by sharing this experience.