Time Machine

The madman possessed a Time Machine.

He used it to move people back and forth indiscriminately, through time.

They found it, the ancient Machine, and practiced using it, and moved a boy who was in the wrong place to the wrong time.

The people saw him appear mid air on his skateboard.  They made a statue toward him.

Going back in time to meet themselves, but they did not speak, for fear they would wreck the future.

They saw each other and kept walking.

The boy needs to be found and brought back to his time before he notices he is gone.

Only another trip through time will resolve that.

They don't know how the Machine works, only how to push the buttons.

This is karma.

Only the madman knows how to unravel it.