I was going up a hill in my Puch Cavette (late 70s, early 80s model) and i was shifting into the lowest gear. I guess my limit stop was messed up and my pedals jammed. I was so confused because my pedals would not moved so i stopped and took a look at what happened. Turns out the chain went past the last sprocket closest to the spokes and fell off behind it. It is now caught and stuck behind it in between the spokes. The top part of the arm for the derailer is also jammed in the spokes.
What do i do now? I tried pushing the chain free but i had no success. I am planning on taking the bike to the bike shop here on Campus on Monday when it is open. Is there anything i can do to fix it though and not have to take it to the shop?