Mine has to be the flashback when George Jetson finally got off the dog walk and stormed into the house almost looking like he wanted to murder Jane. It's almost as if Family Guy finished what Hanna Barbera started.

I forgot which one it was,but then the guy shouts "I'm free!I'm free!"

Oh God, there are too many...will have to get back to you on that one!

mines is also George Jetson Flashbacks

I have many also, but my number one favorite as of now is the one where Stewie was doing that clock/count to 12 thing based on Sesame Street.

Mine was when Peter did the Milkshake dance in front of the Prison Guards, I couldnt stop laughing when I first saw that.

Where Peter was one of the Power Twins but there should be a Lovejoy flashback where Peter directed an episode or a Jeeves and Wooster flashback where Peter directed an episode