I was on a shopping street when I noticed lots of security personnel and bodyguards in black suits and sunglasses. I spotted my professor together with former US Secretary of Defense Gen. Jim Mattis who apparently had come to Germany to do luxury shopping. He also seemed very good friends with my professor who showed him around and talked to him about the good ol' days they had spend together. Mattis for some reason wore a blue Navy uniform with lots of medals but it was clearly him. I was surprised he was such a celebrity he had to be shielded by a mass of bodyguards. I also tried to overhear the conversation with my professor but it made no sense because dream.

How and why the brain comes up with such ideas - we just don't know. At least I know nothing about Jim Mattis.