Looks like Joe Satriani didn't appreciate his song getting stolen, allegedly, although it is hard for me to think of a way this wasn't stolen.
Here is a music professor explaining it:
http://www.youtube.com/watch?v=OEGGFJLpbu4
Here is the coldplay song "Viva La Vida":
http://www.youtube.com/watch?v=dvgZkm1xWPE
Here is the original Satriani version of "If I could fly"
http://www.youtube.com/watch?v=CMcjXo8ZuqE
And if you still have doubt, here is a mashup of the two songs combined.
Satriani should tour with Coldplay because this matches up PERFECTLY and actually sounds pretty good
http://hypem.com/track/698919/Coldpl...+Fly+(a+mashuP)