They have to update the gravity map every time [person you don’t like]'s mum leaves the house.

Interesting.

Gravity maps, in a “heat” context, typically represent intensity being representative of concentrations of mass in a given area, which correlates to that area having a stronger gravitational field; an example would be a mountain range.[3] In the inverse, geological structures such as oceanic trenches or landmass depressions such as those caused by glaciers or fault lines will depict lower gravitational field values, due to the lower underlying amount of mass in the area.

I wonder if the effect sizes have any real life significance… Someone should run a regression with gravity map values and high jump scores 😅.