Here's my idea for how it should work:
Upon creation, the pod will not move (or fall). It will spawn facing downward. When a player enters it, text appears saying "Press <a key> to launch" in the center of the screen. Once the key is pressed, the pod will spawn a small nondestructive explosion at the top and will rocket downward. While in flight, it can be steered VERY slowly. If it impacts another pod, both will explode and kill their passengers. Once it impacts anything solid, it will spawn a small destructive explosion, kick out the player, and spawn a decal of the pod stuck in whatever it hit (the pod will be removed and only the decal will remain). The decal will last for 10 seconds, then it will disappear like a corpse.
How's that sound? Or is some of this impossible to do in Blockland?