Train 57 of the Wengernalpbahn just left the station Grund and crossed the Schwarze Lütschine on it's way to Kleine Scheidegg on 22 March 2002. It consists of a BDhe 4/4 power car, a trailer and a freight car for the skis. Note the pantograph on the trailer. It seems to have no electrical function, I think it's used to clean the catenary from snow if it is neccessary.

Digital photo by Christoph Schmitz