1- 8 1s followed by 2s+3s lead down the middle and up (3s leading) with 2s+3s casting back to places
9-16 1s+2s dance the Knot
17-24 1s+3s dance the Knot
25-32 1s lead up crossing RH and cast to 2nd place, 1s dance ½ Fig of 8 round 2s
(MINICRIB. Dance crib compiled by Charles Upton, Deeside Caledonian Society, and his successors)
Here is a video demonstrating the trick, then explaining it.
The Professor's Nightmare