Free events in Toronto this week are like a healthy shot to your brain and body. There's an environmental talk with A-list speakers and two free chances to workout downtown. Exercise your mind, body and soul without shelling out a single dollar.

Here are my picks for the top free events in Toronto this week. And don't forget to check out my list of top free stuff in October!

"What comes after the environment?" with Naomi Klein (October 17, UofT)
Naomi Klein and Mirko Zardini from the Canadian Centre for Architecture in Montreal host a talk about what the hell is going on with our planet. It'll be a great discussion about the world around you.

Free lunchtime yoga (October 18, Sony Centre)
Use your lunch break wisely and spend an hour stretching, twisting, and breathing at the Sony Centre. It takes place from noon to 1 p.m. and the instructors are from Moksha Yoga Danforth. Check out this website to guarantee your spot.

Night Parade of 100 Demons (October 20, Northern Contemporary Gallery)
The Hyakki Yagyo art show is a night where all manner of yokai, ogres, ghosts and other supernatural creatures parade through the streets in one massive spectacle. Twenty-five illustrators have interpreted a Japanese folklore classic by creating four creatures each. The show runs until October 31.

Why The @#&! Do You Paint? (October 20, Gladstone Hotel)
This is the Gladstone's annual group painting show and you can see it on the hotel's second floor gallery. Curated by Spencer J, Harrison and Lukus Toane, this year's show - which is called Go Figure - features 37 paintings.

The Sunday Sweat Series has been cancelled.

Sunday Sweat Series (October 23, BrainStation)
End your weekend with a free, energetic boost that starts at BrainStation. They've partnered with the city's Aim Fitness to create an all-levels Sunday workout program. The class was created with pilates elements to strengthen your body through all types of movements. Be sure to register here to guarantee a spot.

Did I miss a free event this week you're totally excited about? Let us know in the comments!

Photo from the Northern Contemporary Gallery Facebook page.