وَارْتِفَاعُ مَقْعَدَةِ نَائِمٍ قَبْلَ انْتِبَاهِهِ وَإِنْ لَمْ يَسْقُطْ فِي الظَّاهِرِ
The matn separately lists the actual lifting of the sleeper's seated area before waking, even if no visible fall occurs. This is different from merely leaning while the buttocks remain firmly seated.