Jamie had just about enough time to think that he never fell into water quite as much with his Doctor, then he too hit the surface of the lake and disappeared underneath it with a giant splash. This time, he popped up a moment later, automatically gasping for air. Once he got a good lungful, he shifted to treading water and looking around for the Time Lord - well, calling for him, anyway.

"Doctor!"

There was a faint crunching sound as the corridor up top finished collapsing in on itself, and he found himself feeling grateful not to be in it at the time. However, it did cut off the last little bit of light from above, leaving only that dim green illumination coming from...somewhere. He felt a brief tickle as something moved past his legs, but whether it was a beastie or a fish or just a bit of plant life, he wasn't sure. Whatever it was, he didn't want to stick around and find out. So, then, which way was the shore? Maybe the Doctor would know - assuming Jamie could actually find him.

"Doctor! Where are ye?"