I went into the bathroom and just when I unzipped another guy came in I looked at him and he nodded at me. That was it I flushed and left without peeing
Why did you make it so awkward?
I think it was a little odd, I mean why did he walk in on me
Maybe he was just being polite by acknowledging you by nodding.
I don't know, something about it just made me feel uncomfortable.
I understand why you left if you were feeling uncomfortable. Most likely, the guy was just looking for an empty urinal to use, but it's OK to trust your gut when something feels off.