What music was he playing on piano?

After racing to campus, our newly-confident hero is playing piano. What's the name of the melody, and where else have we heard this before? Is it the tune from Poltergeist? I can't place it.

Update: Answered my own question -- yes, it's the theme from Poltergeist. I'll leave this here in case anyone else wondered. Unless it goes by another name, I didn't see it listed in the credits.