I've never told anyone this, mostly because I was afraid I couldn't phrase it properly without sounding like a loony, but let's try it now (at the very least I'll sound reddit-loony, so...).

Have you ever been listening to a song, and at some point due to some defect in the physical media, a small bit (less than a second) is repeated three or four times, then everything keeps going as normal? I've experienced this "in real life" on three separate occasions. All of them were during the day, while I was fully awake (so no sleep-related issues coud be to blame) and sober (no alcohol, no drugs, no anesthesia, etc.).

The first time was while I was in a lecture hall, with someone giving a speech. I simply thought it was some form of stutter, and there was otherwise no other kind of phisical anomaly, so I thought nothing of it.

The second time was on the street, and I actually saw (or "saw") a motorbike and a car "move back and forth" in the characteristic jittery manner. I was quite confused (nobody else around reacted to this) and didn't know what had just happened; it was then that I associated this event with the one I talked about in the above paragraph.

The third time was during a familiy gathering, while an aunt was speaking. Very much like the first time, only my brother at that precise moment made a "clang" sound with his spoon and cup of tea, so the clang was repeated as well.

I can only suppose my brain is to blame here, but... I did question reality for these anomalies. I wonder what the real reason for these oddities is.