Going through security at Fukuoka airport this morning, my carry-on set off an alarm. I wasn’t alarmed; I knew there was nothing untoward in it. But they sent it through the x-ray machine again. And again. And then took it off to the secret place they take bags that have been naughty.
A minute or so later they came back looking sheepish and handed it to me with apologies. I suppose they saw the mysterious bundle of twigs and wondered if they were detonators. Opening my bag, they would have seen them clearly marked “matatabi”, which is a type of tree bark that has the same effect as catnip. As far as I know, it is not particularly combustible and has very little street value.