I've never really understood those commercials. My brain's always done that normally. Most of the time it's not a problem -- I just ignore it as background noise -- and sometimes it's kind of handy having random things that linearly don't look like they belong together suddenly hooking up.
When I get really tired or too overwhelmed it gets a little surreal, though. This week, for example. The last several days have consisted of a lot of work stress, not a lot of sleep, and a whole bunch of reading a series of books involving Greek mythology. So when I looked at the milk bottle at work, which for some reason someone wrote the company name all over, my brain crossed it with hundred-eyed Argus to produce Argus: The Hundred-Eyed Milk Bottle.
Now the milk stares at me every time I open the refrigerator. It's kinda creepy.