Image of the Day: rare 'roll' cloud takes over Toronto's skyline

Roll clouds may look a lot like a wonky sideways tornado, but don't worry…they aren't dangerous. They result from downdrafts during thunderstorms where clouds break away from each other and create this cool "rolling" effect. Check out the gallery below for more shots of this cloud as it passes over Toronto.

Via blogTO

For the latest tech stories, follow us on Twitter at @dvice