  Josephson junctions and superconducting wires when probed with current pulses
exhibit stochastic switching from superconducting to a stable non-zero voltage
state. Electrical current dependence of the switching probability (so called
S-curve) or switching current distribution is a fingerprint of the physics
governing the escape process. This work addresses the criterion of independent
switching event in a series of switching experiments. Treating Josephson
junction as an electrical coin with current-tuned switching probability we
investigate effect of correlation between switching events on the switching
statistics.
