He walked her directly to that glow and then she noticed the pulsating in the air. When they were only a few feet away, she felt herself being lowered to the ground, and the ropes disappeared from her limbs and back to his skin. He walked forward, and placed a hand on an invisible wall. The blue glow dulled a lot and then Hermione saw a crack standing in the middle of the clearing. It appeared to be a rip in time and space. It looked exactly like the cracks that appeared in asphalt due to the scorching summer sun, and it lined with the same blue glow.