Gnomi was on an outbound C car around 5:15 p.m. yesterday when the trolley stopped in the tunnel just past Park Street. After about 15 minutes:

... There was a garbled message from the conductor that said something about "evacuating," causing all the people around me to look at each other confusedly, but at that point I put my knitting away. A couple of minutes later, there was moving at the back-back door of the car, and people started moving. We were being evacuated back to Park St. (about a 1/2 block walk through the tunnel), where there was another C train waiting for us. That train ended up even more crowded than the original C, but we eventually all got on and were moving through the other side of the tunnel (we passed the stuck train, and we saw that the people on the front car had not been evacuated and were still waiting). ...