ummmm i don't get it. 
nope still don't get it 
Ok, in the 1970s there was a movie called 'Star Wars' that was popular, which spawned two sequels called "The Empire Strikes Back' and 'Return of the Jedi' in the 80s.
In these movies, there was a character called 'Boba Fett', who is pictured in the forefront of the picture. In the background, you will notice a sign for something called the 'JUMBO BUFFET', but you will also notice the first three letters of 'JUMBO' are not illuminated. The remaining parts of the lit sign spell 'BO BUFFET', which is spelled fairly closely to 'Boba Fett'. Therein lies the humor.
HTH,
Wiley.