How to defeat Tsun in Skyrim [EASY AS 1,2,3]

This is kinda nooby :P but it works, when you see me in the waterfall jumping, you NEED to do that so that Tsun jumps down and that you dont fall down the waterfall, once he is in the water with you, make sure he is near the edge and he will fall down and die :D funnily enough, when you cross the bridge, he is there again 8|