It stuck to the end of my screwdriver and fell off as soon as it found itself over empty space. With a quick ricochet off of my left foot it vanished while pinging noisily across the ground.
Small object, big space, mottled background. Perfect camouflage. A gazillion screws are likely lost like this each year.
You can spend a frustrating amount of time peering over the tiles looking for the missing piece. From this perspective, the target is a little black dot against a sea of visual noise.