Roller paper is jammed

After printing a banner, and following manual instructions, I cut the paper before trying to back the paper out. Once before I cut the paper behind and pulled the paper out the front, but this time, against my better instincts, forgot since the manual says it will roll out the back.

The paper now refuses to back all the way out, and is stuck under immovable gears. When the printer was under warranty I had to replace the printer in a similar jam. Is dismantling the machine truly the only way to free the paper?