"That will cause them all to leave? Good."

Thor makes sure all the humans are out of the room before he follows after X, casting searching glances through every room they pass.

Any stragglers are going to get chivvied along by a tall and commanding Asgardian. Emphatically if necessary.

"There's too much energy for this building. It won't hold for long. The materials are not made to withstand such forces."

He can walk out of a collapsed building if it comes down on his head. X too. These humans will die, and he will not see that happen.