This plot was introduced by Trevor Lewis in New Pentagram, Vol. 3 No. 11, Jan. 1972, p. 90, as “Topsy-Turvy or Slow Motion Plus.” The idea became a staple in Ace Assembly variants, with others quickly developing their own handlings, such as Wesley James's version later on that same year, published as “L.S.D. Aces” in Epilogue, No. 16, Nov. 1972, p. 506.