Spontaneous combustion

Friday morning Eric walked into our pantry to find himself some breakfast. He stepped on something sharp and looked down to realize there was some glass on the floor. Puzzled he looked around and saw our crockpot, sitting on the shelf, and the lid had completely shattered. Nothing had fallen on it and I hadn't even use it in weeks so this was just a random case of spontaneous combustion. I thought it was interesting so I wanted to share the pictures!