bicycle rearrangement 

https://doi.org/10.1351/goldbook.BT07331
Photochemical rearrangement of unsaturated substrates by group migration over a π perimeter following the movement of a bicycle pedal. An example is:
Source:
PAC, 2007, 79, 293. (Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)) on page 308 [Terms] [Paper]