What strange items did the security personnel check out when they passed the security check?

I used to be a G20 security inspector. I once asked for a car in the security shed. We asked the driver to open the four doors of the trunk of the front cover to cooperate with the inspection. I was standing next to the car. When the owner opened the trunk, I found a slender black bag inside. The classmate in charge of trunk inspection asked, what is it? The shopkeeper said vaguely, little toy. Then my classmate still didn't believe me, let him open it, and then he reluctantly took it out of his bag.