For other Banshee glitches, see here
The Banshee hovering glitch is a glitch that can only be done in Halo 3's Multiplayer map Sandtrap.
InstructionsEdit
Take the Banshee on Sandtrap and ram it into the angled part of the buildings with the large towers. Make sure you hit the sandbags with only your propulsion jet. When the propulsion jet gets in front of the sandbags, it will stop without touching the sandbags and your Banshee will not move. Instead, it will just hover in that one spot.