One of the most restraint filled things in fly fishing is when a dark shape materializes out of a rock garden and begins following your streamer..
Is to not yoink it away out of it's mouth prematurely. Big guys like this tend to hover, inspect and think it through before committing.
Others eat it with rocket ship speed.
None the less, its a pretty special situation when you're casting from the bow of a raft and from 10 feet away, you see a monster cutty hunt down the sparkle minnow like a boss.