Distinguish a few types of relative size of subject to object with regards to kinetic verbs! (May be distinguished by differential object marking? Or by some verb marking? Or by a weird auxiliary?)
I.e. 'John harvests(small-to-large) the field', 'David killed(medium-to-big) Goliath', 'The villain kicked(medium-to-small) the puppy',
One could also perhaps grammaticalize the amount of premeditation of first person future verbs by some way.