On Mon, 26 Oct 2015 14:04:57 -0000
"TMS320" wrote:

The third is that cars and bicycles are affected differently by the
laws of physics: a car is heavy enough to behave according to classic
Newtonian mechanics; a bicycle is small and light so it behaves
according to, as yet, little understood quantum mechanics. That's why
cyclists shift space-time so that they exist nowhere but everywhere
simultaneously. And helps explain why they are invisible in daylight
but easily seen without lights at night

I think you might be on to something there. Where's the cat? He's
been on our tandem, but not recently.