As we detailed in the Introduction, an important focus of research on stimuli-responsive framework materials has been the search for materials with properties that are not commonly expected in classical dense materials. Many metal-organic frameworks, in particular, have been widely advertised for physical or chemical behavior that is judged "unusual", "surprising", "abnormal", or "weird" (although that one has not, to our knowledge, been used in a paper title yet). Similarly to meta-materials, which are materials engineered to feature rare properties not typically observed in naturally occurring materials, we have previously proposed the terminology of "meta-MOF" -from the Greek root μετά, which means "beyond". In this section, we highlight some of the recent advances in the area of framework materials with counter-intuitive response to stimulation.