Pour slush into glass. Add rum and stir once with straw to mix (careful, over stirring will make the slush melt faster). Toss in handful of cherries and add splash of juice or grenadine for color... a perfect dose of liquid sunshine when IT WONT STOP FREAKING RAINING.
Side note: I highly recommend storing random slushes in your freezer for hurricane season. They come in so handy!!