remember that fluid does not have much space between to move and shake about like gas does. also beer and soda do not spray because molecules are excited. it sprays out because of gas pressure and gas molecules attached to liquid is very weak. therefore small difference in pressure cause the bond to break easily. due to the surface tension of liquid, the bubbles wrapping around gas inside as gas rises up, builds up rapidly, resulting in "spray".
but for water in microwave, imagine tightly packed asymmetric dipole molecules rotating in dipolar bond or imagine tightly packed gears rotating causing friction and heat. here is simple test you can do. ice cube and cold water. lets say, we have 100ml of cold water and same amount in ice. place two separate cups, one with water and one with ice into microwave oven. set timer to 3 minutes and watch the water boils before ice melt. in theory, if resonance is the factor, ice should melt faster since it requires less heat to melt than to boil. if dipole rotation causing collision and friction is the factor, dipole water should heat up faster than ice, because solid molecules are rigid, stuck together and can't rotate freely. hence water boils before ice melts.
