This has happened at least one time before on the green line in my experience. It’s a daily occurrence to be on the green line, it stops and then you sit there for 20+ minutes, then they say everybody has to get off. No explanation ever. Just everybody gets off. One time it happened to be in the tunnel. It was scary. No first responders either. Everybody just got off with their phone flashlights and walked out. I can’t believe how frequently it happens.