Bixxti wakes you up early in the morning to tell you she had a dream where she was a huge blimp floating through the sky and had woken up to find herself pretty inflated.
You scan her to find there is, in fact, a pretty large air bubble trapped inside her. Oops.

She spends a good chunk of the morning trying different ways to get the air out, but it's simply trapped loosely inside her body, with no way to escape, at least until on the walk to the lab with you, she tries to mentally send the air back where it came from, which works after some effort.
You don't ask why she doesn't try this with all that water still trapped inside her body, but you assume she probably enjoys not having to worry about burning things all the time.