Though ingame camera have ABSOLUTELY ZERO head bob (you can test it walking straight to the wall) there's a strange effect, causing Motion sickness - nausea and headache.
Watch the far landscape and clouds.
Who in Obsidian team is high on drugs? Please, remove this stupid effect and those stupid guy, who come up with such stupid idea!
And add OPTIONAL classic headbob camera animation like in thosands other 1st person games.