Diddy's trial has focused a lot on drugs and drug usage over the past few days ... including when Cassie's friend Bryana Bongolan testified that she previously purchased drugs for her -- and pictures of what appear to be drugs have now been entered into evidence.

"I was scared to fall," she recalled on the stand, adding that she had no idea what prompted the outburst. "You know what the f**k you did," Diddy allegedly shouted, according to

As the Sean “Diddy” Combs sex-trafficking trial continues, Bryana Bongolan, a close friend of Combs’s ex-girlfriend Cassie Ventura, took the stand on Wednesday to testify against the music mogul. She said Combs threatened to throw her off Ventura’s 17th floor balcony.