Yeah... kind of similar story, the TSA at my airport has to manually search every bag, since we're too small to have an xray machine. Their screening room is also right next to our garage where we load the bags onto the cart before putting them on the plane. Anyway, I was waiting for an agent to screen one of the bags, and that same explosives detector gave a red flag on a set of golf clubs. We figured it was probably just from fertilizer (but he still checked it out completely, of course).