I’m sure that there’s plenty of “natural”light to guide the way, and zero chance of anything going badly… Mark’s brand of “faith,” driven by, among other things, the fact that we is perpetually 33 years old, should provide plenty of cover when it comes to a perilous situation like this…

And Carina, Mark is not going to “Wait” any more than you obeyed his request, the maneuver that sent you down the face of the waterfall…  But what Mark really needs is Batman’s utility belt!  There he would find an underwater breathing apparatus- the “Re-breather” along with a long cable with a hook  on the end that could be used to maroon himself under water…