I recently went through screening with the wife in Sydney.
As the wife was struggling with putting her shoe back on after screening required her to take them off
, she handed me her handbag whilst steadying on my shoulder with her hand. As I was passing the handbag back to her and I looked up simultaneously, I was selected for the "random" explosive particle check. He insisted that I bring up the bag that I was allegedly carrying through screening, even though it was clealy a women's handbag by brand and appearance and technically never left my wife's hands.
I suggested politely that if he want's to scan the handbag, he should at least scan it's actual owner... he didn't seem interested and said he was about to leave to go home and had to get some more checks done first