OK Now I remember in our science class, You can even ask Lilkimberly on here as we both attended the same High School. We had a chemistry teacher set up a small little experiment, and there was a old bottle of Potassium near the sink( at the time there must have been some water in the sink from a previous class usage)
anyhow... thankfully no one was injured, but the flash from the explosion was contained up front of the class, but the ppl in front row got a good "flashy" show...
Thanks Dasva and Cat.. know I remember.. and that video clip, I watch those guys alot.. they are apart of some UK guys car show called Autos or something..