"On Tuesday night 2km of the river Iska in Slovenia disappeared and left behind fish on dry ground. The residents are saying that they heard a huge bang in the night. It sounds like they are describing it as a possible earthquake-like sound although there was no tremor. One woman said that it was like a huge detonation, as if something big had crashed onto the ground. People went out of their homes to see what was falling down, only to witness the river being drained.
To make this story even more strange, last week there were devastating floods in Slovenia and this river like all others was flooding land and properties. Could it be that some strange technology is being tested here for flood defence purpose? The official explanation is that due to the karst nature of the terrain the river went underground through this tiny hole (see pictures in link below), but the residents are highly sceptical as they have never witnessed anything like that ever (bearing in mind this river has flooded many times before)"