Me and my sister did that with one of my mom's lighters and a plain old spoon when we were like 6 and 7. We had just got done watching some educational kids show on PBS about how heat transfers and part of it was a cartoon segment that showed a witch sturring a cauldron and the heat turned the spoon red up to her hand and she got burned etc.

Anyway, after the show ended we were bored, so we went into the kitchen and got a spoon, and got my mom's Grateful Dead button push lighter held the lighter under the spoon (luckily, neither of us could reach the top of the stove at this age) until it was so hot you couldn't hold it without an oven mit, then we got kind of scared, so we decided to turn on the sink an go throw it in the cold sink water to cool it off.

The spoon freaking EXPLODED and shattered the kitchen window right above the sink. It also broke a porcelean plate that was sitting in the sink.

To this day, my mom still doesn't know how that window and plate got broken.