I was watching Phineas and Ferb and realized something I didn't notice before. I'm probably REALLY late noticing this but in the song "My Ride From Outer Space", from the episode "The Chronicles of Meap", there is a Back to the Future reference!
My Ride From Outer Space\---/Reference is from 0:17-0:21
If you don't know what Back to the Future is (I doubt that many people don't know what it is) then Google it...or Bing it. Whatever flies your tricked out spaceship!
If you don't know what Phineas and Ferb is, here's some money. $1,000,000,000.01. Go buy yourself a nice house so you can stop living under a rock and a TV so that you can watch Phineas and Ferb. The last 9 years must've been really rough for you .