They got their start in the hallways of Western University and the coffee shops of London, and now they're taking Toronto's subways by storm.

The trio is trying to spark a 'train reaction,' to help make commuting in the big city a little less boring and a lot more fun.

Group member Amir Fishman explains "In Toronto, you don't really have that sense of community, you don't really have that feeling where everyone's connect and we miss that, what Western brought...Initially, it was nerve wracking, were were scared out of our minds, but people reacted really positively so we kept doing it, now we've got it down to a science."

The main goal of train reaction is to cause a reaction. The band hopes to generate a movement that will spread to transit systems around the world.

And if the popularity of their social media hook #trainreaction is any indication, they are already on track.

As word of their presence on the subway line spreads online, people fight for position to record the performance.

And, they seem to be getting the reaction they're hoping for from riders.

Commuter Boris Shvarts says "I take this train twice a day and I've never seen people smiling and this happy and everyone's giving each other high fives."

While the TTC may not love the idea, the group hope their idea will attract big name musicians to the trains to play free, impromptu shows.

If you're not a regular TTC subway rider though, not to worry, the group will be performing at Western University's Student Centre on Thursday at 11:45 a.m.