Toroidal variations in the measured plasma currents (Ip) have been observed on JET during VDEs (Vertical Displacement Events). The theoretical explanation of the Ip asymmetries, based on the JET disruption database, is that a long lasting m = n = 1 kink mode is accompanied by negative helical surface plasma currents (Hiro currents) which have a pathway inside the vacuum vessel (or "machine wall"), see figure 1. The m = n = 1 kink modes are responsible for the sideways forces, which occur during asymmetrical VDE disruptions. The disruptions have become a serious issue for future large-scale tokamaks. For example, the sideways forces on the vessel are expected to be tens of times greater on ITER in comparison with JET:Fxµ BTIpa, FxITER @ 2.5.2FxITER @ 20FxJET. Apart from the forces itself, the force durations (or impulse) and force time behaviour are important for the vessel structure loads. Mode frequencies that are close to the structural natural frequencies of the machine components can cause major dynamic amplifications of the loads.