Answer a Question with a Question...

If the object could only move "straight ahead", how could it follow us if we went in the opposite direction? And, If the object moved only straight ahead and we only ran in the opposite direction, wouldn't we meet again as we both were circling the Earth in opposing directions?
 
Don't you get the impression that this object which we are discussing is blocking our passage and preventing us from moving in another direction?
 

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