Oh yeah, I love those things! And they can even have a real use. There is a
linux installer I wrote for a commercial software, that is a Tcl and a
shell script at the same time. Not that tricky as your example, because it
only involves two languages, but works in real world. If Tcl/Tk/X11 is
there, the installer is GUI based, if not, its an interactive shell
Combining languages is a really nice game. I ask myself, if there are other
useful examples of such.
Sorry for being offtopic, but this wonderful example could not be left