"Dragon!" You cry. You always had a thing for the mythological.
A message appears on the screen: "Processing wish..."
You once again feel your back end, but nothing happens! You're about to give up when you hear a thud. Turning around, you notice a green can of soda in a little trough near the bottom of the machine, like a normal drinks machine. A new message appears on the screen: "Upon consumption, the wish will be granted."
"Oh well," You reckon ", bottoms up!" And drink the soda...