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Mr Hobbs said the couple were less than 10 minutes into their walk when they heard an "almighty bang – the kind where the air pressure around your head goes".

How nearly every time we see each other, he reminds me to check the oil and the air pressure in my tires.

"It's probably the only festival that's dependent on air pressure, which dictates how far the tide goes out and how long we can stay on the sandbar," he said.

As air pressure in the chamber decreased, the air inside the teacakes expanded until the chocolate cracked and the mallow filling puffed out.

And in the Pacific north-west , communities are still recovering after last week's bomb cyclone, an intense weather event that takes place when air pressure quickly drops off the coast.