Oh wait, wrong group. Members don't get kicked out in After School if they're injured and don't perform on stage.
AKF's investigation team relayed to me that Lizzy was practicing her pole dancing before Pledis' CEO came up to her demanding a lap dance. Lizzy, who refused to give her boss a lap dance, was the victim of several Pledis employees stomping all over Lizzy's leg.
Pledis' CEO then forced Lizzy to upload this selca to make it seem like everything is alright.