Did you all know about the glitches in Halo Reach? For example the ability to fly a Pelican or Phantom, or spawn 4 banshees? I haven't yet spawned the banshees but I have tried the Pelican.
The Pelican glitch is cool, you just have to back up literally to go higher. And there's no way to defend yourself. But it's pretty awesome if I do say so myself!