diff --git a/Cargo.lock b/Cargo.lock
index 5221945c..c77a753d 100755
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -179,6 +179,14 @@ dependencies = [
  "num-traits",
 ]
 
+[[package]]
+name = "azalea-physics"
+version = "0.1.0"
+dependencies = [
+ "azalea-core",
+ "azalea-entity",
+]
+
 [[package]]
 name = "azalea-protocol"
 version = "0.1.0"
diff --git a/Cargo.toml b/Cargo.toml
index c40178b3..03c048c2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,6 +14,7 @@ members = [
   "azalea-block",
   "azalea-entity",
   "azalea-buf",
+  "azalea-physics",
 ]
 
 [profile.release]
diff --git a/azalea-physics/Cargo.toml b/azalea-physics/Cargo.toml
new file mode 100644
index 00000000..fc007e18
--- /dev/null
+++ b/azalea-physics/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+edition = "2021"
+name = "azalea-physics"
+version = "0.1.0"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+azalea-core = {path = "../azalea-core"}
+azalea-entity = {path = "../azalea-entity"}
diff --git a/azalea-entity/src/physics/aabb.rs b/azalea-physics/src/aabb.rs
similarity index 97%
rename from azalea-entity/src/physics/aabb.rs
rename to azalea-physics/src/aabb.rs
index f9edbb0f..46e93317 100644
--- a/azalea-entity/src/physics/aabb.rs
+++ b/azalea-physics/src/aabb.rs
@@ -1,4 +1,4 @@
-use crate::physics::BlockHitResult;
+use crate::BlockHitResult;
 use azalea_core::{BlockPos, Direction, PositionXYZ, Vec3};
 
 pub const EPSILON: f64 = 1.0E-7;
@@ -393,14 +393,14 @@ impl AABB {
         start_y: f64,
         start_z: f64,
     ) -> Option<Direction> {
-        let mut t_x = (begin - start_x) / delta_x;
-        let mut t_y = (begin - start_y) / delta_y;
-        let mut t_z = (begin - start_z) / delta_z;
+        let t_x = (begin - start_x) / delta_x;
+        let t_y = (start_y + t_x) / delta_y;
+        let t_z = (start_z + t_x) / delta_z;
         if 0.0 < t_x
             && t_x < t[0]
             && min_x - EPSILON < t_y
             && t_y < max_x + EPSILON
-            && max_x - EPSILON < t_z
+            && min_z - EPSILON < t_z
             && t_z < max_z + EPSILON
         {
             t[0] = t_x;
diff --git a/azalea-entity/src/physics/block_hit_result.rs b/azalea-physics/src/block_hit_result.rs
similarity index 100%
rename from azalea-entity/src/physics/block_hit_result.rs
rename to azalea-physics/src/block_hit_result.rs
diff --git a/azalea-entity/src/physics/mod.rs b/azalea-physics/src/lib.rs
similarity index 84%
rename from azalea-entity/src/physics/mod.rs
rename to azalea-physics/src/lib.rs
index 7d62ee64..45ac0186 100644
--- a/azalea-entity/src/physics/mod.rs
+++ b/azalea-physics/src/lib.rs
@@ -1,9 +1,9 @@
 mod aabb;
 mod block_hit_result;
 
-use crate::Entity;
 pub use aabb::AABB;
 use azalea_core::{PositionDelta, PositionXYZ, Vec3};
+use azalea_entity::Entity;
 pub use block_hit_result::BlockHitResult;
 
 pub enum MoverType {
@@ -14,9 +14,13 @@ pub enum MoverType {
     Shulker,
 }
 
-impl Entity {
+trait HasPhysics {
+    fn move_entity(&mut self, mover_type: &MoverType, movement: &PositionDelta);
+}
+
+impl HasPhysics for Entity {
     /// Move an entity by a given delta, checking for collisions.
-    pub fn move_entity(&mut self, mover_type: &MoverType, movement: &PositionDelta) {
+    fn move_entity(&mut self, mover_type: &MoverType, movement: &PositionDelta) {
         // if self.no_physics {
         //     return;
         // };