According to Singapore's Today, Chow had hoped to land safely on a ledge below.
Security footage from the mall showed Chow and Ruth standing next to the railing talking as people walked by. "Help me take a Snapchat video and I'll jump", she said Chow told her.
"I swear I wanted to jump over too but I knew it was too late", she said.
In the CCTV video uploaded online, the victim's friend can be seen holding a phone just moments before he jumped over the railing. They were both supposed to leap onto the ledge and record each other.
It turned out that the ledge was actually made of plasterboard, which collapsed underneath the teenager's weight.
A Snapchat stunt went horribly wrong after Singapore teen Jonathan Chow jumped over the railing in Orchard Central mall and fell four floors to this death. "The glass railing along the link bridge is 1.2 meters high and acts as a safety barrier for members of the public".
His father Matthew Chow told the Straits Times: "He was a friendly guy, sociable and approachable. he was about to be enlisted for national service and was looking forward to it, but now he won't be able to serve the nation". "We don't want other families to go through what we went through".
Chow's Facebook page was switched to a memorial page Wednesday evening.