In Sean “Diddy” Combs’s sex-trafficking trial, star witness Cassie Ventura spent hours being cross-examined by the defense.

Casandra "Cassie" Ventura is opening up about why she participated in the "Freak Offs" — hours-long sex parties where she alleges her former boyfriend Sean "Diddy" Combs forced her into sexual activities with other men.

On the stand in court Tuesday, Cassie alleged Combs would "bash my head, knock me over, drag me, kick me, stomp me in the head if I was down."