ר' יואל רוטה - תיקון ליל שבועות - ב' נשא תשפ''ד - R' Yoel Roth 

Reb Yoel. Pls watch and review your self. You reprimanded a boy because he wasn’t singing? His cheeks turned red from shame. “Kents Nisht?” Why confronting him with negative comments? Your singing could be much more pleasant if you’d be more positive and less criticizing in each שיעור.