Flipping fast: Head‐to‐tail cyclicthiazoletetramers representing flexible π‐expanded cyclooctatetraenes were designed and synthesized (see picture). The presence of fused thiazole rings in a head‐to‐tail arrangement leads to a strong columnar stacking of the shallow saddle‐shaped π‐conjugated molecules, an unusually low inversion barrier of 6.8 kcal mol−1, and reduction‐induced complete planarization