Shaken, not stirred

At 1am this morning I was more than a little traumatised when jolted from my slumber to find the bed beneath me shaking forward and back. On the sixth floor of an apartment block in Manchester, the earthquake (centred in Lincolnshire) felt very real. Apart from a couple of picture frames knocked over and a few lopsided books, there was little evidence that anything out of the ordinary had happened. It makes you wonder though; if you can't rely on the ground beneath your feet, what can you rely on?