If a six-membered aromatic ring undergoes [2+2] cycloaddition, the remaining C=C bond wouldn't stand there, but engages in a consecutive rearrangement. The overall process leads to unexpected and sophisticated two dimensional/three dimensional fused rings. Dr. Jiajia Ma’s postdoctoral work in the Glorius group, in collaboration with Prof. K. N. Houk and Prof. Shuming Chen, is published in Nature Catalysis (see: https://www.nature.com/articles/s41929-022-00784-5).