Have you ever broken glass?

I smashed and smashed away with my largest hammer today , I thought these tiles would break right in half but they did not , I wondered how I would get them started, well my husband reminded me that around the air vent was the perfect spot to start , and it was. It was very exciting to get one of these tiles out , there's no going back now, it shatters some , I willneed to get me some gloves and a mask before I move on , soon this checker board will be history.