I was on my way back from Wales picking up a load of waste flour.Whilst picking the flour up the lad on the fork truck was getting a pallet off the top of the racking in the warehouse and a couple of the 25kg bags dropped from about 20ft onto the truck,no big deal as he was in a safety cage,I could'nt resist shouting over 'are you all white mate?'

I made my escape by going up Bury New Road,but the M60 was blocked by a huge crash where a Spanish driver had side swiped a car which in turn had hit two others.

Pray tell what are they?........

On Friday I was sent to a dry ice factory - how cool is that ? about minus 78c to be exact.I asked if there was any going spare to chill my milk down in my fridge,there was and I got some little bags that were getting chucked out.First things first,get back to the yard,pull my tacho and start to play.

As we had set plan for our experiments and a limited range of liquids to test it on here are our results:

dropped into water - looks good
dropped into boiling water - looks better
dropped into milk - not so good
dropped into water with washing up liquid - best yet
dropped into washing up liquid and boiling water poured on - EUREKA! thats the one.

So now you know,go straight for the last one are our results from this little test.

Boiling water showing that the gas is heavier than air - here
Cold water and washing up liquid - here
Boiling water and washing up liquid - here