Vandalism on the bridge. But some might find the video (with all the police and different agencies responding to the vandalism) and images very distressful.
I was shocked when I walk up to the damage on the Bridge
https://imgur.com/gallery/CUnskop
I don't believe any one was hurt here, I think someone was making a point or a bike thief was testing out his new battery powered grinder.
Edit: Canada Suicide Prevention Service Call 1.833.456.4566 | Text 45645
Consultation about a 3-digit phone number for suicide prevention
https://crtc.gc.ca/eng/consultation/3num.htm