The star formation process in a molecular cloud core is effectively halted when the newly born stars remove the remaining gas cloud out of the region. We present analytical and numerical calculations
of the dynamical evolution of a young cluster, which we allow to deviate from or oscillate around exact Virial Equilibrium (V.E.), during slow and rapid gas removal. Our conclusion is that
deviations from V.E. can influence the final dynamical state of the 'nakeď cluster significantly.