It is not that hard to imagine something of an astronomical proportion will happen if you don't do A, B and C. You know that you're lying, but somehow it is possible trick yourself to believe that there are some truths in that lie. If you don't even remember where you left your phone before going to bed last night, isn't there a possibility that you might actually believe your own lie?
You lied, you believed it and you did your job. That's really wonderful, as you had succesfully tricked your inter-temporal self, I think that is really something. Let's do more of this, shall we. :)