To me the picture looks like a Riverside (D), Type 7, taking the wall rail (used for C and E routes) and the loop is the track on the right side of the picture. That would explain passengers being on the train. I've never scene a reverse move on the loop. Since the speed through there is 6 MPH or less and if the operator is on the ball or maybe off the ball caught it before it popped off the track.
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