Thor arrived albeit without the usual storming and thunder. He had been advised that the man they sought was to be treated as an ally and would not react well to sudden stimulation like a sudden storm. Thor flew high above obscured by cloud cover. He saw no sign of the mortal who called himself 'Thunderbolt Ross'. The Odinson mused to himself that the man wouldn't know thunder if it bit him in the ass.
Once the coast was confirmed clear he slowly descended and landed next to Captain America. He spoke to the man "Bruce Banner, we mean thee no harm. We only seek to talk with thee. " Thor stood by in a non-threatening manner observing him carefully but passively.