how to flood a bathroom
i think you have missed the point here; how you shower is somewhat 'culture specific'.
once talked to property manager of a group of prestige flats in the west end. he had continual problem with bathrooms being flooded as many of his clientele were middle eastern or southern european. there, shower curtains are unknown and it's your choice whether you shower in the shower tray, bath or somewhere else in the bath/shower room. his guests continued to do this despite the bathroom being carpeted!