Gidday, The Steam Loco after standing so log idle must vent off the buildup of prassure by dumping steam, this is a very rare event, It can also be seen at 29.40.
@@JJBari Gidday, the loco's and rolling stock are from the Ghan railway ( Narrow gauge), which ran from Port Augusta to Oodnadata, the n onto Alice Springs. all items belong to Australia