Sean “Diddy” Combs’ former assistant has said that “there was not one cell in my body that was surprised” when she saw the disturbing surveillance footage that showed the music mogul assaulting his then-girlfriend Cassie Ventura at a hotel in 2016, RadarOnline.com has learned. Suzi Siegel, who worked for Diddy between 2008 and 2009, when he was dating Cassie, told CNN that she “felt sick and I felt violently angry and I felt like I’m sure a lot of men and women feel looking at that video, that it’s so disturbing. The video doesn’t lie.” Siegel said that she “rode in the limos with them, I went…