Luke found out Vader was his father, but instead of putting away his light saber and talking about it, he overreacted and got his hand cut off.
ولي بجاي اينکه شمشير نوراني اش رو بذاره کنار، و درباره ش صحبت کنه، هيجان زده شد و دستش رو قطع کرد.