While the name specifies a man, the cannon will launch anything that enters it. However, its strength will be diminished when heavy objects such as the Warthog or Chopper drives through it, and the cannon will not launch them as far. As shown in the Halo 3 Vidoc, Is Quisnam Protero Damno, Bungie created the Man Cannon to replace the teleporters because it adds far greater challenge and risk to the gameplay. “Although it was a great way to get around quickly, it didn't provide as much inherent danger as the man cannon does.” — David Candland, interface designer at Bungie