Just for a little bit. I didn't keep it on for longer than necessary though. [That is to say that yes, it was just for the alien. He hadn't experienced any effects, but...]

Some people kept the masks on longer though and it made them act totally crazy. [He pauses, licking his dry lips as he thinks of how to phrase this.]

If Yu hadn't healed me I'm not sure I would've made it back to the colony either.