I read the train stopped for a block and was running 15 mph into the terminal, a stub track. It's not uncommon in this kind of operation to have to wait for a track at the station "throat" (track switches).
You stop, then usually proceed at "restricted speed" or "yard limit." That's "prepared to stop short of all obstructions and stop signals."
So, the engineer duly stopped, then came up to the usual slow speed and then blew his final stop brake application. The headhouse is only about a car length from the end of track. And at that speed, the stopping distance is quite short, so I would be amazed if any conductor or train employee except in the first couple of coaches would notice no brakes in time to pounce on the emergency brake cord.
And putting a brake trigger on the spur? No....the commuters like it better the closer the engineer stops to the post.


Up hills slow,
Down hills fast
Tonnage first and
Safety last.