Should I feel weird my coworker ignored me outside of work near the restroom?

I was putting cart away at the store and heading to restroom and glanced his way he seemed like he kinda looked but more on the phone either way I feel like if I saw him he must have seen me and didn’t even say hi I could of had but he didn’t really look up and we speak at work how would you feel in this situation if you saw a coworker outside of work by the way I was still supposed to work but I left earlier and he was off today

Should I feel weird my coworker ignored me outside of work near the restroom?
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