It is critically important for all microswimmers to be able to reorient themselves in order to find food and to avoid toxins. The mechanism by which a bacterium with a single rigid flagellum may reorient is not immediately obvious and is due to a buckling instability of the short, flexible hook that connects the head to the flagellum. However, there are still several unresolved issues in modelling this process. In this talk, we present a discussion of these issues before presenting the results we have obtained from modelling the system ourselves.