Jetpack Volleyball

 is a song from the episode "Sleepwalk Surprise".

Lyrics

 * Just strap on a jetpack
 * And string up a net, Jack.
 * Gonna serve it to you,
 * So get ready to set back.
 * Whack, smack, thunder crack,
 * Try to hit that ball back!
 * Dig it, bump it, set it, smack it!That's the way I really like it.
 * Plenty of fuel so you ain't gonna fall,
 * We're playing jet, jetpack volleyball.
 * We're playing jetpack (jetpack!) volleyball,
 * Jetpack (jetpack!) volleyball.
 * We're playing jetpack (jetpack!) volleyball,
 * Jetpack (jetpack, jet!) volleyball.
 * Don't need to be a giant over six feet tall,
 * We're playing jet, jetpack volleyball

Background information

 * Phineas, Ferb, and Isabella shout the word jetpack the song, but don't sing at all. It is also Isabella's only speaking line in the episode.