Large-scale structures like the CfA2 Great Wall and similar cosmic filaments exhibit unexpectedly thin cross-sectional dimensions (on the order of 10-20 Mpc) compared to their enormous lengths (hundreds of Mpc), creating a high aspect ratio that challenges Lambda-CDM structure formation models. In the standard hierarchical assembly picture, gravitational collapse should proceed somewhat isotropically, producing structures with more comparable dimensions in all directions rather than extremely elongated, sheet-like configurations. The thinness of these walls suggests they formed through a process that preferentially compressed matter in one or two dimensions while allowing extension in the perpendicular direction(s), which is difficult to explain through purely gravitational evolution from Gaussian initial conditions (Gott et al. 2005; Sheth et al. 2003).