100% right largie whisperer - in nice clear water you can see another trout chasing the other nymph on your nz rig after one is hooked. I once hooked a small trout on the dropper then a bigger trout came along in full view and grabbed the trailing black flashback pulling the unbarbed dropper from the mouth of the smaller one. Ended up as a big bonus landing the bigger trout. This was in a stillwater though.