More a gltich than a hack, but if you position yourself in the door frame (or something similar) with your arms hanging down and push both your arms against the frame with all your force and keep doing that for about 30 seconds and step away while completely relaxing your arms your arms will raise themselves upwards while you are relaxing your arms.
I, uh, I think you're doing something wrong. I don't know what, but you're doing *SOMETHING* wrong.