The explosion is easily capable of destroying most blocks in the vicinity. Fragile blocks, such as Dirt and Sand , are the most affected, while sturdier types, such as Obsidian , are more resistant to the explosion. TNT does not obey physics until lit, where it will then fall as an entity until it hits a block or detonates. It is a very infamous griefing tool, as a TNT block can easily destroy most blocks besides obsidian and Bedrock . Because of this, it is often banned on servers that don't allow griefing. TNT is a natural block because it naturally appears in Desert Temples and is used as a trap in them.