River pranks are great fun, especially when the fishing is slow. And they're pretty fun when the fishing is good too. My favorite happened in Alaska, when Trent Kososki put on a brown bear costume and hid in the tall grass until our buddy Conway Bowman hooked into a nice steelhead. You know the rest... Trent came bounding out of the bushes, Conway almost literally ran across the river surface, and I'm pretty sure he tested the leak-proof seams of his waders from the inside. You have to make sure your buddies don't have any heart conditions before doing that one.