[WilliamMayor]

I remember hacking

    print "Hello world!"

into

    print "Hello World!"

and crossing my fingers, pressing the button, and being amazed that it worked! I was convinced that somehow it would be more complicated than that.

[Beliavsky]

I wish Guido van Rossum had left well enough alone, so that the above line was valid code in current Python (it works for Python 2, not Python 3).