Bernard Evans stepped out of his time machine and marched across to the memorial commemorating his famous arrival. There was a policeman standing guard.
“Hello. I’ve come back.”
The policeman stared at him.
“The first Time Traveler. I thought I’d travel forwards in time to the scene of my triumph and see what sort of memorial you’d come up with.”
The policeman took out his notebook.
“Right, that’s it. I’m arresting you on a charge of wasting police time.”
“That’s the third occasion you’ve done this today and I warned you last time not to do it again.”
Author’s note: It must get quite confusing for a time traveler to remember when they had been somewhere before.