Snively estimated that a naked head struck the surface with a force more than 1,000 times greater than gravity, or 1,000g, which is lethal. I assume it meant "

Snively estimated that a naked head struck the surface with a force more than 1,000 times greater than gravity, or 1,000g, which is lethal. I assume it meant "the acceleration of a naked head upon hitting the surface is estimated as 1000g", as I can't make sense of it otherwise. It would also help to say what height he dropped it from or the impact speed.