A few seconds later all was still again and after a few confused moments, I went back to bed, this time with Karin tucked in firmly behind me. Martin slept through the whole thing.
It was an EARTHQUAKE! In SWEDEN!! Apparently registering a 4.7 on the Richter scale, which is pretty respectable, even though it only lasted about 10 seconds all together, and was felt all over Skåne. Pretty freaky!!
Edited to add The Local (in English), Sydsvenskan and Aftonbladet (in Swedish)