What does it mean if a guy nods his head saying hi and then looks down?

[Anonymous]

This guy I know who works at a store I shop at saw me today and he nodded his head hi. And then he looked down as I was leaving he said have a beautiful night I said you too.

[he and I slept together awhile ago]

[Gringothegango]

respectfully acknowlege you than proceded to take a moment to remember you as you were leaving , nostalgia.

[one1wild00]

Given your history he may have been admiring and remembering what was under the clothes fondly.

[Wise4myage]

Sounds like he's really shy.

[Beerluvr]

Maybe shy. Maybe checking your body out.