> Can take up to 30 seconds to blow, even on a hot fire, plenty of time to
> retreat.
The worst is when after 2 or 3 minutes it still hasn't blown, what to do?
Another interesting one is to put baking soda and vinegar into a bottle and
put the lid on quick (or use some cunning method to delay the mixing of
vinegar/soda). 500 ml soft drink bottles can take a huge pressure before
exploding!
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