South Platte, North Fork

From this guys line to river left is bad news, you will be swept directly into an undercut just barely out of the photo. It is luckily pretty forgiving. This guy, and most who go left of the launch pad, only get knocked over by the undercut rock. But if you fail to roll back up the swim isn't fun;-)
Too far right, and you will piton hard and then a vareity of neat things can happen. You can splat the rock backing up the hole or just surf the hole sideways for a while. This bold paddler surfed the hole for a few seconds but made it out OK. Better to be too far right than too far left.
Ouch!

Beleive it or not, this paddler did not surf the hole. It's not a perfect line, but not a bad one either.
Pretty, isn't it? Good news for those who are intimidated by the crux, you can put in just below the undercut(large pyramid rock at top of picture) and run the bottom half(IV+ at low, V at medium, and V+ at high water). The big hole at the bottom is asymetrical and usually is pretty darn forgiving, the mean hole is formed by the small ledge just above it!
This two step drop is very pushy. The ideal line is to drive to the left and catch the river left eddy, like the boater in the green boat. From this eddy, a REALLY squirrely eddy I might add, you can ferry right to miss the undercut. Easier said than done;-) At the bottom of the picture you can see the rapid takes a severe 90 degree right turn with most of the water pushing left into a large undercut rock.