Well since it's Friday. . . .

What better time to look at a footprint in the sand :-

"It happen'd one Day about Noon going towards my Boat, I was exceedingly surpriz'd with the Print of a Man's naked Foot on the Shore, which was very plain to be seen in the Sand: I stood like one Thunder-struck, or as if I had seen an Apparition;"
From: Defoe's "Robinson Crusoe"