Let me also say that's its very very common to have these types of Easter eggs in movies... stuff like names of characters are old friends or strings of numbers are kids birthday.. I myself have slipped in personal items of significant personal value into productions.. they will be in the background or subtly used. They personalize the movie for me.. also cool when many years later you point it out to your kid.. "hey btw thats your birthday", or "see there on the table, that's grandpa's clock, the one from my office..."

Not uncommon at all...