  In this paper we investigate di-atomic molecules embedded in ice crystals
under strain. In this environment coherent vibrations of many OH-bonds may be
generated by one WIMP collision. The detection of such multiple-photon signals
may provide a signature of a 100~GeV/c${^2}$ WIMP. To do a proper lab test of
WIMP-induced multi-photon emission is very difficult. We suggest that Ice Cube
make a search for multi-photon events, and investigate whether the rate of such
events exhibits yearly modulation.
