Only explanation. My moms a psychic and this is basically how she draws cards.

youtu.be/a4_8WK5LmD4?t=240

Don't know why people are thumbing you down. You're right, watch the link.

Used to being thumbed down Nice link!

if theyre clsoe to the surface you can see it lifting as they go

but sometimes their a little deeper, but you can feel the ground sort of pulse as they go by, similar to the feeling of you hearbeating on your chest, that "bump" sensation. using your hand you can feel for this bumping an locate the mole.

look at the grass at 0:25