I don't have the module but I think they try to simulate the vibrations the helicopters are producing in general. Vibrations that are used as feedback.
It is true that they look funny on the screen as they are counter-intuitive a bit. The "eye-perception system" is doing normally a great job stabilizing the image for the brain-mind but in the sim it seems to fail and is a bit of a discomfort.
One other example is the cockpit of P-51 that have main gauges on some separate plate mounted on some dampers it seems in real life just for extra damping... but in the sim is the most vibrating part