Shades of Slaughterhouse Five!!
Heck, everyone knows that this is old hat. To go faster than light, you just jump a ride in the 5th dimension where time stands still, then pop back here when you get to where you were going. Trouble with all this is that you get to where you are going before you hopped the ride, and therefore forget why you went in the first place, or even that you had gone at all.
Wow, I can’t believe I just wrote that......
This really happens to me.. OFTEN.
I walk into a room and can't remember why.