matticus
Guru
A bit late (ie totally too late) but having worked in workshops, whenever you droo something small...instantly fix your eyes on the area below where its falling. .
If your eyes are fixed, you tend to have a better chance of seeing something move through that vision.
If your eyes are darting around, its almost impossible to see something moving in that area.
If youre lucky, it at least let's you know the direction of travel.
It's a spring, not a mouse!