Second half of the first verse from Dodo by Genesis.

Darth Vader
Agitator
Keeps asking questions, says he wants to know why

I'm apparently not alone.

It's a pretty awesome live video i've linked to (good quality audio and video, nice focus on the musicians playing their instruments in a way that you can actually see, and Phil Collins gets crazy at the end), but unfortunately they do a close up on Collins' face when he says my mondegreen, so it's more difficult to hear it the "improved" way.