Even science majors and grads don't always get it at first.

I taught students and trained junior researchers during and after grad school. When I'd catch lab assistants doing lopsided centrifuge loads, especially in the big floor-standing centrifuges (I even caught one genius sitting on it to dampen the vibration), we'd take a trip to the physics department for a quick lecture on the amount of energy contained in their spinning samples compared to the amount of energy required for a plastic centrifuge tube to fracture and penetrate a human skull.