Headscratchers / Blue Reflection

• There are times when the Sephirot caused collateral damage around the school. One instance is the introduction of Cochma, which smashes through walls and fences and makes tracks in the sports field. It makes sense that because of the space time distortions, no one but the Reflectors and Supporters knows what really happened; Yuri is the exception since she tracked the space time distortions herself. But how does it return to normal, or rather, turn into an Unusually Uninteresting Sight for the rest of the school and the people living there?