Toronto police say she has identified the woman who cast a chair from the high balcony
Her dangerous joke was captured on the camera and posted online, where she was seen more than 700,000 times.
The chair seems to be hurrying to the Gardiner motorway, one of the busiest highways in the country, but there are no registered injuries.
Internet hunters have been trying to find the woman since Monday
In the video originally sent to Snapchat, the woman can be glad to cast a chair from the high balcony to the highway below.
The video was then uploaded to Facebook, where it became viral and caught the attention of local authorities.
"We believe we know who it is," said David Hopkinson, a spokesman for the Toronto police.
He said the police had reached her directly and advised her to turn around, but a snow storm in Toronto meant her transmission could be delayed.
Reddit's post claims to show the chair, broken down, on a pavement near the same highway.