In Regards to the mask task I thought that the time between the housemates being told about the task and then emmas interview with Megan. The housemates had decided what order they were going to enter the room as they walked in quite controlled and just calmly stood behind boxes giving Big Brother plenty of time to rig the boxes with what they wanted each housemate to receive from inside each podium all this could have been done while we were watching Megans interview we would not have know any of this was going on.
Big brother would have heard where each housemate had decided to stand and could have placed the gold mask inside the podium they knew Gemma was going to be next to. Isnt that possible.

They would not want to take risks with this and would obviously hope that nobody changed their minds.