Icicles of Death Writing Prompt

So this writing prompt is inspired by the HUGE icicles decorating my house right now (they're finally starting to melt but it's going to take a while). As a mystery writer, sharp objects always get me thinking, 'How could I use this in a story?' Take a look at this photo and then read on below:

How would you use ginormous icicles in a story? As a weapon? A convenient accident? Or, if you're more normal than me, maybe something completely unrelated to someone getting killed or hurt. Regardless, write a scene where icicles play a role - either as a stand alone exercise or as a way to spice up a WIP. Have fun!