Pelican death glitch

Explanation
Death is a common part of the Halo series. However, death tends to be more amusing when it happens to the player, and when it happens for no apparent reason. Such is the case when riding in a Pelican on the level  Assault on the Control Room.

When the level starts, if the player continues to rapidly press the enter/exit vehicle button (or action command for PC players), the player will hop out of the Pelican and then hop back in. After a few moments, the Pelican's script will kick in, and it will fly back in to the shaft room it came out of, leaving the two elites standing there, firing at you in vain. Given the size of the shaft room, Foehammer will have to go vertical, nosing over roughly 80-85 degrees below the horizontal. As the player looks out the rear of the Pelican, the depths of the shaft room become visible. Eventually, Foehammer will travel far enough down that the view becomes obscured by a turquoise fog. About five seconds later, the player will mysteriously be ejected from the Pelican and die almost instantly.

Theories

 * The common theory as to why the sudden death occurs is the classic crossing of some sort of barrier scripted into the game that causes a player's death. However, there are two problems with this common misconception:
 * If one uses a modding program to disable falling damage, the player will survive the ride and simply fall to the ground when the Pelican spawns away.
 * In the level The Library, built into the game is a true death barrier that can only be removed via modding. If the player is on any one floor and attempts to jump down or up to the next floor, the game will kill the player. This is so the level is not circumvented. For example; if the player hops from floor 3 down to 2, the instant the player passes floor 3, the jpt! (damage) tag 'guaranteed_plumit_to_untimely_death' will trigger the death, regardless of falling damage values. This can be removed by using a modding program to set this tag's damage value to 0.
 * The cause is not from the Pelican spawning away, leaving the player in midair, as one can still hear the Pelican's engines as the death animation plays out. This would suggest that death is caused by the Pelican nosing over too much, causing the player to be ejected, and the falling damage script triggers the player's death. A similar effect is observed when a player gives a Banshee max pitch. Too much vertical climb will cause the game to treat the player-vehicle unit as a flip-over, which means the player is ejected from the vehicle.