I experienced something absolutely bizarre with this, making me want to try and reupload to see if the same thing occurs. I had some footage laying around that was taken on a windy day, with buses and wind and kids screaming, and for the most part it was greatly improved.

However, a few seconds into my recording there is a part where there is someone else's dialogue for a few seconds. I can't make out what they're saying but it definitely sounds like a man, with a Latin-American accent, speaking English for a second.

Could that be a hallucination or somehow they mixed audio from another recording? It only last for about a second, but it's so strange.