  Minkowski's Object and 'Death Star galaxy' are two of the famous cases of
rare instances when a radio jet has been observed to directly hit a
neighbouring galaxy. RAD12, the RAD@home citizen science discovery with GMRT
being presented here, is not only a new system being added to nearly half a
dozen rare cases known so far but also the first case where the neighbouring
galaxy is not a minor or dwarf companion but a galaxy bigger than the host of
the radio jet. Additionally, the jet appears to be one-sided and the jet after
interaction completely stops and forms a bubble inflating laterally which is
unlike previous cases of minor deviation or loss of collimation. Since the
nature of radio jet-ISM coupling is poorly understood so far, more discovery of
objects like RAD12 will be important to the understanding of galaxy evolution
through merger and AGN feedback.
