In this Google-translated article a Russian security guard explains how RDJ went sightseeing in Moscow on Monday evening.
“He literally ran away from us. He said he wanted to spend some time in a hotel room and then a regular man passed by. We had no idea it was Robert, because he behaved like he doesn’t know who we are and what we were doing there. So about an hour later we found out he was lost. I tell you, we were so shocked. We looked literally everywhere and someone told us that he left about an hour ago with some of his friends and went for a walk. Couple of hours later we finally heard that he is in Nobu now, so we found him there. He friendly explained to us that he hates being treated like a star and he just wanted to take a walk and see Moscow with his own eyes, not from the hotel window. He is really unusual man”, explanation of security