except for the fact that it's a little high. >> nothing that says no? tyler has a different take on waterfalls than your average sightseer. >> dude, let's do this thing, man. i think this needs to happen. >> tyler and russ call in their support team. it looks like tomorrow will be the big day. >> in doing something like palouse falls, you can't practice for it in any other way than mentally preparing, running it over and over in my head. >> maybe so. but there's a big difference between visualizing going over a waterfall and actually doing it. the next day the safety team takes their places. two kayakers wading in the pool, a rescuer ready to rappel down behind the waterfall, and another one on the shore with a lifeline. they also have multiple video cameras pointed at the falls,