Lughaidh wrote:
Normally you use the adverbs with "an-" with the verb "teacht", and the adverbs with "s-" with the verb "dul/ghoil/ghabháil":
Chuaigh sé síos/suas/siar/soir...
agus
tháinig sé aníos/anuas/aniar/anoir...
ie. when you say "He came down" in English, you have to say "he came from up (?)" in Irish (I dunno if this exists in English

)
Tá sé ag dul/goil síos. He is
going down.
Tá sé ag teacht anuas. He is
coming down.
Directions are used a lot in Irish. And for things that would never be used for in English.
Tháinig sé aniar aduaidh orm. [It came from the Northwest on me]. Meaning - It came out of the blue.
But I don't think it makes a difference in English or Irish if your friend is up or down at the time. It is the person that's doing the activity that matters.