Billy nodded, then sighed and stood, he gently slid an arm around her. "I'm going to try something, okay? Hold on. I know a random teleport spell, which will take us one place within the building." And when she was ready, he concentrated, letting his mind fill with the magic he had been learning, and then pronounced one spell.
And with a popping sound, they vanished from the elevator...
...and reappeared in mid-air above the water tank being used on another set. With a yelp, they fell, and the water splashed around them. Thankfully, it was not deep, and it was a matter of a moment's effort for them to get up and be heads above the water, but, ah, yes, now they were all wet.