Gravity may be thought of as more than just a mechanics of attraction and repulsion. One should not also make a simplistic reduction to a curvature phenomenon.
A point of synchronization can be thought of as a gravity point with Newtonian-like properties. On the other hand, the matter of the synchronization horizon of a system resends towards a gravity with Einsteinian-like properties. The synchronization horizons are linked to dynamic limits of affection/perception.
Gravity is fundamental when dynamic systemic mechanisms of religare/synchronization are present.
Some memes and memeplexes can be considered to produce more meme-gravity than others, for instance, the memeplexes that are produced by religions, capable of attracting a great number of followers, and repelling a great number as well, generate large gravitic volumes.
Memes and memeplexes' gravitic volumes, in this line of thinking, are related to their replicative value, interconectable with the self-sustained co-evolving spirals, referred by Dawkins in Unweaving the Rainbow.
School shootings can be considered to produce social, historical gravity, and meme-gravity, their gravitic volume being related to their replicative value.
Viral videos make-web (fazem-teia) and, by making-web (fazendo-teia), they make-gravity (fazem-gravidade).
In this line of thinking, one can also state that stand alone complexes can produce a lot of gravity.
When one works with horizons of discourse, one should take into account that they are very gravitic, in this more general sense of gravity. Without gravity, for instance, we would not have a doubly articulated human language. The esphenoid needs a lot of "gravitic help". Without gravity there would be no such things as thoughts and feelings, without gravity there would be no organisms, there would be no life, without gravity there would be no structures.