Footage captured by SBS showed security guards in the parliament wheeling a whiteboard into the centre of a corridor as Senator Michaelia Cash approached, blocking the camera's view of her as she walked past.
The video as sparked jokes on social media, in the aftermath of Senator Cash's threats to expose rumours about Bill Shorten's female staff.
Senator Cash provoked outrage among Labor MPs and some in the media on Wednesday when, after being asked by Senator Cameron about the employment record of her chief of staff, she responded by threatening to name women on the opposition leader's staff who had been the subject of "rumours".
The uproar continued on Thursday, with Mr Shorten denouncing the comments and saying his office was still waiting for an apology.
Senator Cash withdrew the remarks during Wednesday's estimates hearing when pushed by Labor Senator Penny Wong, but she did not apologise. Asked again about the comments on Thursday, she said she withdrew them "unreservedly".
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