Every so often you will see a video about someone trying to break a wine glass by singing very loudly.  Old movies and cartoons are ripe with this seeming cliche, but some physicists still banter about the question of whether or not a human voice can actually do it.  Well, a high school physics teacher in  had one of his school's more talented male students try the trick, and after a lot of practice he actually learned how to do it.

 

National Public Radio picked up on the story and went on to put together a very interesting video on how sound can break glass (as well as video of the student singing and the glass shattering in his hand) and what the physics principals are that allow it to happen.  Take a look at the NPR video and judge for yourself.