I really like my slow cooker, but I have found that most recipes for them don't seem to have been very well tested. In a lot of instances I have to tweak them to achieve good results.
I've never experienced exploding water, but I did see it happen on an episode of Mythbusters. From their demonstration I can say that I'm glad that I don't have first hand experience with this.
Hi Cath,
If you want to experience the real thing then maybe you could try ordering some graham crackers online. Perhaps NetGrocer would ship to Australia.