Disclaimer: DO NOT ATTEMPT THIS YOURSELF.
This is a puncture test of a Chromebook battery cell. This is a cell from an HP Chromebook battery. Keep in mind there are 3 such cells in the Chromebook. Imagine what would happen with all 3 cells. This goes to show how dangerous a laptop computer battery fire can be. I disassembled the battery and only used one of the 3 cells for testing. Battery's are from a scrap computer.