Flushing

Last week there must have been no rain water 'cos there was no flushing! This building is ECO friendly supposedly and you just wave your hand over the button to flush. However something went wrong and 3 different toilets I went to hadn't flushed. Not sure if it was the same throughout the building but I heard some people went home early !
They obviously hadn't been to T in the Park or used Latrines at camp! Ugh the memories.