process

when you try to move on,

you notice there are  heavy stones shutting your way.

they look so real which are not.

someone made you feel they are real. 

they are skilled, 

they really are skilled enough to do that with their eyes closed ,without even intent.

cleverly crafted .

they could make them unnoticed ,until you actually try to go to the place where they never want you to.

the obstacles look light and small at first, that is a trick.