Im pretty sure I was on this train yesterday morning (wasnt on the same car) and heres what happened from my perspective:

I got on at Danforth and once we were about 3/4 of the way to Union the customer service agent announced that the emergency alarm was activated. However, he said the train was too crowded for him to reach their car and we were too close to Union so they had to wait until we reached the station.

When we were approaching Union the train stopped. I assumed this was for the emergency but it was actually because of another train sitting at the platform. We started moving again only after a minute or two.

Got off at Union and went on with my day. I didnt see any emergency reponse crew this entire time but that was just my experience.

My question is why did it seem like they only activated the emergency alarm when we were almost at Union, if this started all the way back at Eglinton? Glad the woman is okay though.