In the "valley". And yes, it was done on purpose.
The ride broke down and a train was stuck in brake 1. The following train had already been dispatched and was ascending the lift, but since the train in brake 1 was stopped, the train on the lift also stopped. Most of the time the ride can just be restarted, but apparently in this case whatever stopped the train in brake 1 was serious enough to require an evac. In the past, a train stopped on the lift would be slowly cranked to the top of the lift and evacuated by the fire department (over 160ft in the air...), which was a huge headache. But as it's been pointed out already, new brakes were added to the drop to prevent an evac like that from happening again. So now, in the event of an evac with a train stopped on the lift, the train can be slowly cranked to the top, the new brakes can be enabled, and the train can be released, slowly coming to a stop at a much lower/easier to ecav point of the ride. There's even a special rolling staircase specifically for this kind of situation. I believe this is the first time they've had to use this procedure with guests, but it seems to have gone well!