Now, what happens when we apply some type of force? So for instance, let's say I jump, and when I jump, what happens is the joints in the knees basically experience an impact force. And what happens is a force is applied onto the agriculture. And when a force is applied onto the aggregate, that basically forces all these water molecules to leave this section. And that basically slightly deforms this agricent protein molecule, the proteoglycan. And when this is essentially deformed, it absorbs some of that force.