hmm, i just found this exercise

I discovered this little exercise a while ago. Stand under a door then take a small step forward (door is now behind your back), put your hands on both sides of the door frames at your waist level, then lean backward towards the door and hold as long as your can. You can vary the intensity by the degree of lean, and you can also try push back to return to the starting position then repeat. When I do it I can really feel it in the triceps and every muscle in the upper to mid back.

Haha, yea I like this exercise. It's like a foot supported lean into the Victorian. Definitely felt it in the triceps and rear delts.