Wheel Nut:
It’s idiot proof
Lower both trailer legs before dropping trailer!
Now then Malc,
Not everybody knows that the landing legs are independent of each other, so it needs a warning notice to point that out to the unwary. 
I delivered to a place in Harworth, Dema glass, they use to turn some sort of suction device to help the blower to move the product easier. One day one driver goes in, gets the nod to start blowing, gets it all off but matey boy who controls the suction device did not turn it off when he should have and sucked the tank in like a plastic bottle. It popped back out again when put back under pressure, never found out if it totally knackered the tank though!
Fileep:
…and sucked the tank in like a plastic bottle. It popped back out again when put back under pressure, never found out if it totally knackered the tank though!
Like this? 
Slaters of Kirby Misperton
Pentus Brown of Leighton Buzzard
Phil Reed Eight Wheeler Pressure Tanker