Oliver ventures to the water. As a Wizard of Water he didn't believe Franco in the slightest. Until he got a good look at the water himself, it was the machinery. He gazes at the water for several seconds.
Survival 3: Not sure if this will allow me to detect anything wrong with water or not.
Oliver looks downstream. He knows the the giggling is coming from upstream, but he doesn't know if Franco can be trusted.
"Something is giggling."
He said no more. He hoped that Franco would take his staring downstream as a visual aid to run that direction. Maybe he and Francesca could check out the real source of the giggling without a hot-head running around.
Oliver motions for her to sit on a rock. Assuming she does so, he tilts her head back slightly, and begins humming a tune. His puts his hands a foot or two above Francesca's mouth in hopes the fluid will rise out of her and into his hands.