caffeination machination

This happens when you are really over-caffeinated and you come up with some diabolical scheme or plot to do something a bit evil. It seems like a good idea at the time, but it typically backfires on you and you are the one suffering the consequences. It's fun while you're coming up with it though - so there's that.

Kevin: "Who keeps on sending me fishing lure catalogues? I am loving it. I am simply in heaven. There's no going back!"
Mary: (Muttering to herself) "Damn! This wasn't supposed to happen!"
Kevin: "Mary? Would you like to go on a fishing date with me? I know where the catfish meow if you know what I mean..."
Mary: "It appears that I have yet again fallen prey to another caffeination machination."