Jonathan leapt before she could say no :
“We both thought the parapet was made of concrete, but when he jumped, he fell straight through,” said Ruth, who is currently assisting the police with investigations. “I knew it was dangerous, but before I could stop him, he already jumped over. I swear I wanted to jump over too but I knew it was too late.”Earlier reports said that he went on the paraphet to retrieve his phone but the video (you can watch it here in The Star Online article) seems to confirm her story. He jumps over the barrier while the girl was filming in the security camera footage.
Source : Teen who fell to death from Orchard Central wanted a video taken: First-hand witness
Jonathan Chow was rushed to hospital but he died.