Does everyone believe that there is such a thing as running good or running bad in poker???....or is it just a mind thing???

I mean i believe there is such a thing as hitting a run of cards and i have scene ppl play this way where they play ATC (Any Two Cards) and seem to hit everything

I have also scene ppl just run bad where they can't buy a hand and bust outa every tourny they play with the best hands

So is it true or is it in your head???