Well, I never!

Did you know that custard is bulletproof?  Apparently it's a non-Newtonian fluid which, as I understand it, means that under normal circumstances it behaves like a liquid but when subjected to a massive shock (like being hit by a bullet) it instantaneously turns into a solid.  And this is not just an "Oh, fancy that" story - there are plans to use the technology to make better body armour for soldiers.