Dozens of Metro passengers were stuck on the tracks after their train lost power and suddenly stopped near the College Park station Tuesday evening.
The situation only served to further frustrate riders, many of whom haven't had power at home and are struggling with the intense heat.
Some 300 passengers were stuck on the Green line train just before 6 p.m.
They soon found themselves walking the 300 yards to the station after the second train sent to assist them stalled, suffering its own mechanical malfunction.
Dan Abeyta said the chaos and confusion followed as passengers reached their boiling points, irate at the walk home, instead of the ride and all without an explanation.
Abeyta added, "When you don't talk to them, and it's hot, then claustrophobia, that can be a pretty volatile situation."
Just before 7:30 p.m., the spokesman for the Prince George's County Fire Department tweeted that some of the riders were evaluated by medics at the station. Power was restored, and the train was moved.