وَيُسْتَحَبُّ ... أَنْ يَجْعَلَ إِصْبَعَيْهِ فِي أُذُنَيْهِ ... وَأَنْ يُحَوِّلَ وَجْهَهُ يَمِينًا بِالصَّلَاةِ وَيَسَارًا بِالْفَلَاحِ
It is recommended to place the fingers in the ears. During حَيَّ عَلَى الصَّلَاةِ the face is turned to the right; during حَيَّ عَلَى الْفَلَاحِ it is turned to the left. The source teaches turning the face; this level does not add an unsupported rigid rule about every movement of the chest and feet.