1–
: 1c & 2c Petronella Turn to midline | ½ Reel4 | Petronella Turn to sides (2,1,3)
9–
: All set | all pass P RSh to opposite sides | all chase clw ½ (3,1,2)
17–
: All turn P RH ; turn P LH (3,1,2)
25–
: 3c+1W & 1M+2c RHA. 1c end in centre LSh to P ; LSh “Snake Pass” [unwind the RHA, 1c leading, pass other snake LSh through 2plx and chase cclw] (2,1,3)

*Deviser's note:  
Second time through couples need to anticipate the transition from the snake pass into the petronella reel progression.*