When the repulsive forces within the liquid metal surface exceeds the forces of the surface tension, it vigorously explodes.
wˌɛn ðə ɹᵻpˈʌlsɪv fˈoːɹsᵻz wɪðˌɪn ðə lˈɪkwɪd mˈɛɾəl sˈɜːfɪs ɛksˈiːdz ðə fˈoːɹsᵻz ʌvðə sˈɜːfɪs tˈɛnʃən, ɪt vˈɪɡɚɹəsli ɛksplˈoʊdz.