As Ray hit the water, two things went through is mind. One, being that his phone was now shot. And two, he couldn't swim. It's not like he didn't know how, just the Outworld Council removed his ability to float; the extra magic made him heavier. As he floated to the bottom, he watched as Acon stayed somewhere near the surface. Ray let himself go limp, and eventually rested on the floor of the lake.