Year ago I the TSA spotted my Leatherman multitool. Fortunately it was a TSA Safe one.
When they pulled me aside and told me that they need to look inside my bag, I asked them if they wanted to see my multitool. They said yes and I dug it out for them. The agent was probably early to mid thirties very nice about it. So he looks at it and I was telling him about some of the features and some of the tools it had that he didn't realize were on it. He was very interested in the design and features. Wouldn't surprise me if he went out and got one for himself. Had a very nice conversation and interaction with him.
In another incident, my son's back pack got searched. He was 2 or 3 at the time. The agent looks through his bag and pulls this metal spring out and asks "What is this?". It turns out that one of the sofa bed springs (holds the mattress support in place) in the hotel room fell off. He thought is was a toy and threw it in this stuff when he packed up to go. Kids are great!