+;;;###autoload
+(defun butterfly ()
+ "Use butterflies to flip the desired bit on the drive platter.
+Open hands and let the delicate wings flap once. The disturbance
+ripples outward, changing the flow of the eddy currents in the
+upper atmosphere. These cause momentary pockets of higher-pressure
+air to form, which act as lenses that deflect incoming cosmic rays,
+focusing them to strike the drive platter and flip the desired bit.
+You can type `M-x butterfly C-M-c' to run it. This is a permuted
+variation of `C-x M-c M-butterfly' from url `http://xkcd.com/378/'."
+ (interactive)
+ (if (yes-or-no-p "Do you really want to unleash the powers of the butterfly? ")
+ (progn
+ (switch-to-buffer (get-buffer-create "*butterfly*"))
+ (erase-buffer)
+ (sit-for 0)
+ (setq indent-tabs-mode nil)
+ (animate-string "Amazing physics going on..."
+ (/ (window-height) 2) (- (/ (window-width) 2) 12))
+ (sit-for (* 5 (/ (abs (random)) (float most-positive-fixnum))))
+ (message "Successfully flipped one bit!"))
+ (message "Well, then go to xkcd.com!")
+ (browse-url "http://xkcd.com/378/")))
+