Ok, let me get the prerequisite, "I'm in a wheelchair and can't do deadlifts" out of the way..
So, shrugs are a boring move with very little movement. Also, I wanted to do something to simulate the top lockout portion (upper body) of a deadlift. I combined these two factors into an exercise I have not seen before.
Here is what I came up with. Set a 0-90 incline to about ..uh... this angle --> / I'm going to guess it was about 70-80 degrees. Sit facing the bench with your legs back in a nice humping posture. While lying with your body and forehead against the bench, grab a set of dumbbells. Shrug up and arch back until your body is verticle.
By doing this I was able to turn the boring DB shrugs into a lift that recruited a lot more muscle. Before this, the only way I could work my erectors to any extent was to really arch hard at the top of the move on a Hammer Strength ISO Row.
Most exercises have been invented long ago. However, if nobody has "invented" this one, it shall be referred to as a "Harmon shrug" henceforth. This is done as a matter of self-worship. =D