. >> carlos greer is a writer for "people". >> you can see beyonce's security sort of holding solange back, grasping her and trying to prevent her from attacking jay z. >> security not only tries to protect the rapper, but attempts to guard the famous couple's image. >> it looks like he presses a button to contain what is happening in the elevator in the elevator so people don't see it when they open the door. >> beyonce stepped in and said, hey, don't talk to my sister, but jay z appeared to do nothing. didn't seem like he did enough to prevent the confrontation with rachel roy. and so by the time they were leaving, he apparently said something that solange thought was inappropriate to beyonce and to her and so that's when she flipped. >> later, in the video, solange attempts to kick jay z while she's being restrained. this time, beyonce, who has been surprisingly calm, moves between them. when the elevator finally opens, solange lashes out again. jay z exits, looking stunned. >> this was a huge surprise. i don't think anyone knew there was tension. >> they all walked to a waiting ca