I was thinking of perhaps the start of it has a notch like the end, which makes it feel like it's the wrong path. That would be cruel though!
Printing this at 0.3mm slices, with 30% fill at 100% scale on a Wanhao Duplicator 4, taken roughly 3 hours to print (the core), but looking much better than the others people have printed! Found out how to make multiples at a time on ReplicatorG, so this is going to be running all night!
This is pretty decent, have been thinking you could get this mass produced and sold as a gag gift (buyer puts money or vouchers in it and gives it to the recipient). Would keep anyone amused for hours.