Computer simulation of the dynamics of ions on (100) surfaces of LiCl, LiBr, LiI, and NaI after sudden double recharge of an anion (X − → X +) has been carried out. The Coulomb, Pauli, exchange, and Van der Waals pair potentials have been taken into account. It is shown that if such recharge occurs in two surface layers, it may initiate the ejection of positive metal ions (M +) and, assisted by the capture of an electron by a departing M +, metal atoms M 0. To eject positive halide ions (X +) more complex charge situations are needed. Besides the Coulomb repulsion the Pauli shock is shown to play an essential role in the driving of the ejection process.