After seeing coverage on television and being horrified at reports of vehicles intentionally hitting pedestrians in other parts of the world, we are now dealing with a similar homegrown incident.
Early Monday afternoon, a man drove a rented van along a sidewalk on Yonge Street in Toronto, killing at least 10 people and injuring many others.
It's easy to point the finger at what may be a litany of reasons -- however, Toronto Police have already ruled out terrorism.
I saw one post on Twitter related to Monday's incident that began with the phrase "we thought we were immune".
Outside of massacres related to wars during the early settlement of Canada, sadly we have had our share.
For many of us, the most famous of them is the Ecole Polytechnique shootings in Montreal that claimed the lives of 14 women and the shooter by his own hand in 1989.
Also in Montreal in 1972, the Blue Bird nightclub fire in which 37 people died -- after three drunks were refused entry and torched the place using an accelerant.
Sprinkled throughout the list are multiple incidents in which as many as nine people have died, just not so spectacularly.
A retired RCMP officer thinks the accused in Monday's deaths was looking to die through "suicide by cop", and we've heard the man may have had mental health issues.
Police kept their heads, and arrested the suspect quickly.
And the efforts of paramedics likely saved additional lives.
We are not immune to multiple killings in Canada and so far, few have been the result of extremism.
The sad thing is, terror-related incidents likely will happen -- and the ease of how this week's incident in Toronto was perpetrated should serve as a sobering heads-up.