Option to not catch exceptions?

[fleimgruber]

Execution of a code block such as

#+BEGIN_SRC ipython
1 / 0
#+END

leads to pop up of a *ob-ipython-traceback* buffer containing the ZeroDivisionError exception traceback. Is there a way (header option?) to pass the exception through to the #+RESULTS? This would be for didactic purposes, e.g. to illustrate how StopIteration works for generators.