Originally Posted by AmayaTenjo
Did anyone know that Halsin has dialogue when you fight the eagles in the mountain pass? Is it real or did the youtube short lie to me? I thought it was so strange for him to have it

Checking the dialogue files, he does have quite a few lines in 1b and they aren't marked as IMPOSSIBLE. There are also some approval tags.

There's an exploit to get Halsin to return with you to Act 1. Larian could have thought about the situation, or the dialogue is just leftover junk from a development path not taken.