cornstarch madness

Ok first up i attempted the cornstarch on speakers i bought for £8 from the first charity shop i went to in Camden and non surprisingly they blew up after bout 15mins of messing around with different frequencies. I'm guessing it was part and parcel with me not knowing too much bout sound waves. The first attempt was a miserable failure, I didnt even manage to get any footage of it working for a couple of seconds. here are a few photos of the aftermath...