Hearing noises from inside the walls is never a good thing...
lololololol, no it is not and I can imagine what your face expression looked like when you heard it. The comparison between European and Australian mice was hilarious and made me laugh until I cried :D
Haha... it might be a touch overstated.... but I have to say that the European seagulls (or at least the ones here in Den Haag) are VISCIOUS! We only have little cute ones in Australia...