i almost wet myself when i found out about this. a certain (fictional?) thriller novelist ex-forces i think wrote a book regarding infiltrating the st. petersburg museum eavesdropping centre and i am almost certain he included in the yarn a fake rock (could of been a budski can) placed outside the museum which was discovered.

i'll bid for it if they put it on e-bay (expect postal delays up to six months for packages originating from the former soviet republics... i jest e-bay so cool it with the extradition request,please!).
fake rock, another for the database.
f.