High or sudden force can cause a musculoskeletal disorder even if not repetitive or sustained, so an occasional or brief task involving it may still be a risk. The risk depends on the intensity of force, the speed (fast movements and sudden speed changes are high risk) and whether the force is jerky or sudden, for example throwing or catching loads, a load or workpiece moving unexpectedly, a fence post that comes free suddenly or a patient who suddenly falls. High and sudden force is common in handling live people or animals and loads that are unstable, unbalanced or hard to hold.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.