Prompted by citycycling's Golden Rules:
It is also the case that on a bike to pedestrians a cyclist is 'whizzing' by or speeding; while to the car behind that very same cyclist is 'crawling'.
Not an original thought, but when travelling at 15 mph on the road, being passed closely by a vehicle travelling at 30mph is a bit alarming.
Passing an ambling pedestrian on a bike at 15mph involves a very similar closing speed.
Yes, the kinetic energy in the two cases differs by a factor of at least 40 (4x for the speed doubling, and at least 10 times heavier), but still alarming for the ped...
In the interests of full disclosure, I am one of those cyclists who has knocked over a pedestrian...
It was on a borrowed, ill-maintained bicycle, before I knew better about the importance of brakes...
I failed to stop, mounted the kerb, and took out a pedestrian coming out of a shop. They got up, proceeded to help me to my feet and then asked me if I was OK.
*blushes*
Please learn from my shame - present even in the case of low energy, no injury impacts!
Robert