Many explicit time integration codes employ quadrilateral elements in two dimensions and hexahedral elements in three dimensions with one-point quadrature. Finite difference methods based on the contour integral technique employ similar equations. The major drawback of one-point quadrature in these elements is a mesh instability often known as hourglassing, which was first recognized in finite difference literature. It is a special case of the phenomenon known in finite elements as kinematic modes or spurious zero-energy modes. In this paper, an hourglass procedure which is not activated by rigid body modes is described. Some solutions of the diffusion equation (both linear and nonlinear) are presented.