Did you notice it first time round?

I feel like i have cheated on Simpsons by watching so much futurama.. but i love it. The first episode is so important. Pay carefull attention when Fry goes to deliver the pizza and falls off the chair before getting thrown in to the furture. Just by the chair is the shadow of Nibbler who you will find out many many episodes later was actually hiding under the table and pushes the chair causing Fry to fall!!!