Water jets are a surprisingly efficient method of slicing, and they’re more hygienic than using a blade, which can harbor bacteria. This ultra high-pressure water jet forces a stream of drinking water between 15,000 psi to 90,000 psi, through an opening just 0.004 inches in diameter. Keep in mind that the pressure that the weight of the atmosphere pushes down on you with is only 14.7 psi (pounds per square inch).
A high powered jet of water can even cut through 8.5 inches of steel!
It also makes short work of a danish (don’t ask me why they decided to cut a danish with an industrial water jet):
Am I the only one wondering about what it does to bone? Nevermind.