Very cool Doc thanks for the link.
My Highschool chem teacher put way to much zinc into a beaker with hydrocloric acid in it and corked it off with a glass vent tube to concentrate the stream of hydorgen gas coming off... But the vent was too small and enough preasure built up that the beaker exploded, sending acid and glass through out the room. Several students were hit with the glass shards. Thankfully the acid didn't make it very far, and the teacher had on an apron to protect his abdomen...
Could have been lots worse than it turned out to be....
Regards, Kirk