I recall working on traps was watching the res[ponse to freshets. One freshet we got a couple hundred coho which is a lot in a stream that hated 5 or 600. While we were passing them up an angler stopped by. He had been fishing down at the mouth and noted how they just blew by. I am sure Rivrguy saw lots of the same thing; on the stream every day shows a lot. Big flush of water and things slow down passage-wise.