Lobby Dosser did say:


When the dog approaches, brake sharply to get behind him. THEN speed
up, planting a large boot on his butt. I've never had to do it
twice.

On a bicycle, with my shoes clipped into the pedals, doing that would
require more dexterity than I can muster.


That's what the pump is for. Works just as good as a boot.

Alas, I have one of the little CO2 cartridges. Not nearly as intimidating.