This paper describes progress achieved since 2007 in understanding disruptions in tokamaks, when the effect of plasma current sharing with the wall was introduced into theory. As a result, the toroidal asymmetry of the plasma current measurements during Vertical Disruption Event (VDE) on the Joint European Torus (JET) was explained. A new kind of plasma equilibria and mode coupling was introduced into theory, which can explain the duration of the external kink mode 1/1 during VDE. The paper is illustrated by first results of numerical simulations using a free boundary plasma model, relevant to disruptions.