Earlier quoted context omitted.
My "secret" is to hold the bottle in my hand and swing my arm in a large arc, using centrifugal forces to pull the ketchup towards the mouth of the bottle. (With the cap on, obviously). SCIENCE
the only problem to this method is when it slips and the bottle ends up in the neighbors window.
Or someone forgets to put the top back on properly and you end up redecorating your kitchen.