A type of Āraṃbhikī Kriyā (violence-based urge);
the activity indulged in through crushing of Jīvas (living beings) and that of rejoicing at the violence of the Jīva perpetrated by someone else.
chedanabhedanavistramsanādikriyāparatvam, anyena cārambhe kriyamāṇe praharṣa ārambhakriyā.
(TaVā 6.5)