diff --git a/examples2d/utils/character.rs b/examples2d/utils/character.rs
index 491d839..5592e08 100644
--- a/examples2d/utils/character.rs
+++ b/examples2d/utils/character.rs
@@ -50,7 +50,7 @@ pub fn update_character(
 fn character_movement_from_inputs(
     gfx: &TestbedGraphics,
     mut speed: Real,
-    artificial_gravity: Option<Real>,
+    artificial_gravity: bool,
 ) -> Vector<Real> {
     let mut desired_movement = Vector::zeros();
 
@@ -77,8 +77,8 @@ fn character_movement_from_inputs(
 
     desired_movement *= speed;
 
-    if let Some(artificial_gravity) = artificial_gravity {
-        desired_movement += Vector::y() * artificial_gravity;
+    if artificial_gravity {
+        desired_movement -= Vector::y() * speed;
     }
 
     desired_movement
@@ -91,7 +91,7 @@ fn update_pid_controller(
     pid: &mut PidController,
     speed: Real,
 ) {
-    let desired_movement = character_movement_from_inputs(gfx, speed, None);
+    let desired_movement = character_movement_from_inputs(gfx, speed, false);
 
     let character_body = &mut phx.bodies[character_handle];
 
@@ -129,7 +129,7 @@ fn update_kinematic_controller(
     controller: &KinematicCharacterController,
     speed: Real,
 ) {
-    let desired_movement = character_movement_from_inputs(gfx, speed, Some(phx.gravity.y));
+    let desired_movement = character_movement_from_inputs(gfx, speed, true);
 
     let character_body = &phx.bodies[character_handle];
     let character_collider = &phx.colliders[character_body.colliders()[0]];
diff --git a/examples3d/utils/character.rs b/examples3d/utils/character.rs
index 71f68bd..fdcd9f7 100644
--- a/examples3d/utils/character.rs
+++ b/examples3d/utils/character.rs
@@ -49,7 +49,7 @@ pub fn update_character(
 fn character_movement_from_inputs(
     gfx: &TestbedGraphics,
     mut speed: Real,
-    artificial_gravity: Option<f32>,
+    artificial_gravity: bool,
 ) -> Vector<Real> {
     let mut desired_movement = Vector::zeros();
 
@@ -88,8 +88,8 @@ fn character_movement_from_inputs(
 
     desired_movement *= speed;
 
-    if let Some(artificial_gravity) = artificial_gravity {
-        desired_movement += Vector::y() * artificial_gravity;
+    if artificial_gravity {
+        desired_movement -= Vector::y() * speed;
     }
 
     desired_movement
@@ -102,7 +102,7 @@ fn update_pid_controller(
     pid: &mut PidController,
     speed: Real,
 ) {
-    let desired_movement = character_movement_from_inputs(gfx, speed, None);
+    let desired_movement = character_movement_from_inputs(gfx, speed, false);
     let character_body = &mut phx.bodies[character_handle];
 
     // Adjust the controlled axis depending on the keys pressed by the user.
@@ -139,7 +139,7 @@ fn update_kinematic_controller(
     controller: &KinematicCharacterController,
     speed: Real,
 ) {
-    let desired_movement = character_movement_from_inputs(gfx, speed, Some(phx.gravity.y));
+    let desired_movement = character_movement_from_inputs(gfx, speed, true);
 
     let character_body = &phx.bodies[character_handle];
     let character_collider = &phx.colliders[character_body.colliders()[0]];