Not a flat earther, but according to them we subconsciously turn slightly to match the curve of the earth... The best part is that we technically do turn to match the curve of the earth, but vertically, which they can’t seem to comprehend.
It has nothing to do with the earth being round, it has to do with the human legs not being the exact same length. Because of this tiny difference, it will cause the human to turn little by little as they run
Good theory @tony007 but the original text clarifies a straight line and doesn't clarify "human" simply "you". I propose that this is a quote given to an alien whose planet was observed to be round. This was significant of course due to the earth being flat. If you run in a straight line long enough on earth, you'll eventually drown.
Also @everyone this is a joke. I am aware the earth is round. I am also aware that there is no straight line which can be walked around its circumference, due to vast oceans.
Also @everyone this is a joke. I am aware the earth is round. I am also aware that there is no straight line which can be walked around its circumference, due to vast oceans.