Somewhere around 2005 I was in Berlin giving a seminar and lab session. The hardware was shipped in its own travel rack but I was in the habit of carrying a bluetooth battery powered inkjet printer with me in my checked luggage so that we could update the handouts to suit local 'conditions'.
No problems getting in - but coming out I heard my name over the airport tannoy telling me to contact an airport official. I find a sample of such to be told that they had some questions about my luggage. Turns out the printer had a suspicious outline on the xray and then the chemical sniffer reacted (to the inkjet ink??? I never did find out). So I get shown into the windowless room - with 3 cameras mounted on extending arms, two severe looking men in suits and 2 guys with sub machine guns and uniforms. My case is on the table in the middle of the room. Cue buttock tightening moment.
Suit #1 asks what is in the case. I tell him, paperwork, handouts, clothes etc. Suit #2 produces xray printout and says "what is this". A printer I reply. Suits exchange glances and one of them says "it's too small to be a printer". I shrug and say we can always look at it. You want me to get it out? Suits exchange another look and say yes. I move towards the case to be told, in no uncertain terms, STOP. Cameras are moved into place - one of them watching my face, another watching my hands and another, I assume, getting a wide angle look. Uniforms unship the guns. Am told "proceed". I unzip the case and veeerrry slowly remove the printer. Ask if they want to see it do stuff. Another exchange of looks and "yes". Fortunately the battery was charged so I flipped it open, put a sheet of paper in it (also from the case) and hit the test button. Out comes a test print. At which point I start breathing again.
Cameras are stowed, uniforms leave and suit says "I suggest you don't fly with that thing in your luggage". I had to agree,