"This makes we wonder whether you know about hydraulic rams (water-powered water pumps) - <a href=""https://en.wikipedia.org/wiki/Hydraulic_ram"">https://en.wikipedia.org/wiki/Hydraulic_ram</a>",(reply>), Chris McKenna Considering he mentioned them in one of his Language Files videos (and how machine translation used to turn them into "water sheep", making his friend Matt Gray — an engineer — laugh behind the camera), I'd say he probably has.