The lavaboat glitch, is where if your lavaboat is destroyed while the player is in it, you are unhurt by lava until the map is reloaded. The boat can be destroyed by player, or by running into a block at high speeds.
Effectively, this could be used for under-lava bases
- The boat may have to ram a block multiple times
- When jumping out of lava, there is a chance the player will get hurt, the player can be hurt enough to kill them, the best way to solve this, is by getting in another boat then getting out.