"Flippin":  This is a useful method of fishing for reds.  If you've spotted a fish, or group of fish, position yourself slightly upstream from them, ideally so that the fish are at about your rod tip's distance out into the water away from you.  Strip out 6 to 9 feet of line from the reel.  Hold the rod in one hand and the line in the other.  Lob the fly out upstream allowing the cast to take out as much of the line as possible.  As the fly hits the water, your rod tip is pointing at it.  The fly will sink and be moved downstream in front of you.  As the fly moves downstream, follow it with your rod tip, and pull on the line with your free hand to control the fly's movement and to keep the line tight enough to feel a strike.  As the fly moves downstream past you, let out more line with your free hand. Then you can pick up on the fly by raising your rod tip and pulling on the line, to flip the fly upstream for another cast.  (If this description is confusing, I'm sure you'll see other people doing this, and it's not a hard technique to pick up.)

As the fly is pushed downstream, you should feel your weight tap on the bottom.  If you don't feel the occasional tap, add more weight.  If the fly snags on the bottom, you can move your rod tip a little faster, or remove a little weight if it's dragging on the bottom.  By practicing you can aim your fly's drift.  You can control the fly's movement, both across and down current, by how you pull on the line and move your rod tip.  The fly needs to be down just above the bottom.  If it's even up at a red salmon's dorsal fin height, it won't bite.  Some reds don't bite no matter how many times you put the fly in their face.  

By drifting the fly downstream, and not pulling it quickly across the stream, you'll avoid snagging fish.  I prefer using a long 8.5 foot rod so that I can reach out with the fly and not have to cast out and pull the fly across the path of the fish.  I can float it down parallel to their path right into their faces.  I've experimented in cases where I've found single fish resting in pools of slower moving water.  It can take as many as 15-20 casts where the fly goes right by their mouth or right into their face before a red will finally bite.  

Reds come in large numbers.  When your fly drifts down into a large group, the fish you're aiming at might not bite, but his neighbor, or the fish behind him might.  If reds are moving upstream quickly, they won't bite.  When they're moving at a slower pace, in a group, or resting, they may bite a fly that comes into their strike zone. It's not as frustrating as it sounds because of the number of fish involved.  If a single fish will only strike one out of fifteen times, a single cast that presents the fly to a number of fish may produce a strike; and some fish will bite at the first fly that comes by.