I was on that disabled train this morning.... Not a lot of fun, and the there was onboard misinformation as to which train would eventually get us into CC.
I'm not sure of the full causes, but we stopped short just north of Jenkintown on the mainline (waiting 10 minutes), limped into and boarded at Jenkintown over another 10 minutes, then crawled south for about 500 feet until the wire was all over us like an octopus. A couple of people pulled an emergency release, jumped off and walked back to the station despite having a live wire in the area. (The conductor was not pleased about that)
Once we eventually powered back to Jenkintown, it was a mess all around. The 5 overcrowded cars worth of passengers repeatedly had to go through the pedestrian underpass following conflictory information about where to go.. Nobody got hurt as far as I know, but it was a 3 hour mess. Glad we all eventually got where we needed to get to.