Chopin : Scherzo No.1 op.20 (an extract) -Masao Takahashi, piano- 髙橋 真生（ピアノ）

When I played the last but this Scherzo 32 bar, in the fff chord, a piano chair slipped back and I nearly fell down the chair.
I am a man of small stature (145 cm, 47 kg). That was why I stood firm using my left leg and managed to continue playing.
It happens, and we must deal with properly.