I saw this on the internet once and had a chance to actually use it...

If crazy glue touches backing soda..it hardens immediately.

So I have what looks like a water faucet coming out of my home in nevada. I think maybe its made of heavy porcelin, like what toilets are made of. Dense and heavy. Its not connected to a water supply and has no on and off apparatus. Its just a faucet about 8-10 inches off the ground out of the side of the house.
I was carrying a ladder and hit it by mistake and it cracked off. Since its coming ut of the side of a wall, crazy glue by itself would not hold it as gravity just makes the piece fall to the ground. So i dipped the loose surface in baking soda, and put the crazy glue on the piece coming out of the side of the house.....and it held like magic in2 seconds.

Its great for those times where gravity prevents the 2 pieces from staying together.