Fabian GiesenI have a soft spot for magic tricks where there's really not much of a trick and the performer does pretty much exactly what they say they're doing.
A beautiful example is Paul Gertner's "Unshuffled". https://www.youtube.com/watch?v=LlTF1Y4a888
YouTube
If you either know a bit about permutations or have done some SIMD programming before, you should be able to see exactly what he's doing (except for the finale) and, well, he's not lying.
All you need to do to perform most of this trick yourself is to grind perfect (Faro) shuffles (split deck exactly in half, then a riffle shuffle that perfectly alternates cards between the halves) in hand to the point where you can do 3 in a row reliably. Smoothly, in seconds. In front of an audience.
John Kaniarz@rygorous Reminds me of a PC Demo from the 90’s that had an effect where they rotated the four corners of an image (4 big sprites), then rotated the 4 corners of the 4 corners (16 sprites)… and kept doing this until it rotated the 4 pixels of the 2x2 blocks and was left with the original image rotated 90 degrees.