article_snippet.sent: Pavel Yaremenko was at the shopping centre and said the problems started when the boys began to 'fool around' at the top of the building.
article_snippet.sent: The 29-year-old said: 'I don't think the boys really intended to jump, but the boys friends were encouraging the boys so the boys decided to do it. '
article_snippet.sent: Once the boys started picking up speed the boys must have regretted it but it was too late to stop then.
article_snippet.sent: Jacob Polyakov (orange top) and Jamal Maslow (blue top), both 17, quickly gathered speed and hit the stone steps below the edge of a glass shopping centre roof with some speed .
article_snippet.sent: They really hit the ground fast.'
article_snippet.sent: The video was captured by one of the boy's friends.