diff --git a/engine/physics/src/physics.rs b/engine/physics/src/physics.rs
index 3b495b99..35d75a3a 100644
--- a/engine/physics/src/physics.rs
+++ b/engine/physics/src/physics.rs
@@ -57,6 +57,9 @@ impl InputState{
 	fn replace_mouse(&mut self,mouse:MouseState,next_mouse:MouseState){
 		(self.next_mouse,self.mouse)=(next_mouse,mouse);
 	}
+	fn get_control(&mut self,control:Controls)->bool{
+		self.controls.contains(control)
+	}
 	fn set_control(&mut self,control:Controls,state:bool){
 		self.controls.set(control,state)
 	}
@@ -498,13 +501,19 @@ enum MoveState{
 	Ladder(ContactMoveState),
 	#[expect(dead_code)]
 	Water,
-	Fly,
+	Fly{no_clip:bool},
 }
 impl MoveState{
+	fn is_no_clip(&self)->bool{
+		if let MoveState::Fly{no_clip}=self{
+			return *no_clip;
+		}
+		false
+	}
 	//call this after state.move_state is changed
 	fn acceleration(&self,touching:&TouchingState,models:&PhysicsModels,hitbox_mesh:&HitboxMesh,style:&StyleModifiers,camera:&PhysicsCamera,input_state:&InputState)->Planar64Vec3{
 		match self{
-			MoveState::Fly=>vec3::zero(),
+			MoveState::Fly{..}=>vec3::zero(),
 			MoveState::Air
 			|MoveState::Water
 			=>{
@@ -523,7 +532,7 @@ impl MoveState{
 		match self{
 			MoveState::Air=>(),
 			MoveState::Water=>(),
-			MoveState::Fly=>{
+			MoveState::Fly{..}=>{
 				//set velocity according to current control state
 				let v=style.get_propulsion_control_dir(camera,input_state.controls)*80;
 				//set_velocity clips velocity according to current touching state
@@ -537,7 +546,7 @@ impl MoveState{
 	/// changes the move state
 	fn update_walk_target(&mut self,body:&Body,touching:&TouchingState,models:&PhysicsModels,hitbox_mesh:&HitboxMesh,style:&StyleModifiers,camera:&PhysicsCamera,input_state:&InputState){
 		match self{
-			MoveState::Fly
+			MoveState::Fly{..}
 			|MoveState::Air
 			|MoveState::Water=>(),
 			MoveState::Walk(ContactMoveState{target,contact,jump_direction:_})=>{
@@ -565,7 +574,7 @@ impl MoveState{
 			=>Some(walk_state),
 			MoveState::Air
 			|MoveState::Water
-			|MoveState::Fly
+			|MoveState::Fly{..}
 			=>None,
 		}
 	}
@@ -589,7 +598,7 @@ impl MoveState{
 				}
 			}),
 			MoveState::Water=>None,//TODO
-			MoveState::Fly=>None,
+			MoveState::Fly{..}=>None,
 		}
 	}
 	fn set_move_state(&mut self,move_state:MoveState,body:&mut Body,touching:&TouchingState,models:&PhysicsModels,hitbox_mesh:&HitboxMesh,style:&StyleModifiers,camera:&PhysicsCamera,input_state:&InputState){
@@ -1195,6 +1204,11 @@ fn next_instruction_internal(state:&PhysicsState,data:&PhysicsData,time_limit:Ti
 	let trajectory=state.body.with_acceleration(state.acceleration(data));
 	//check for collision ends
 	state.touching.predict_collision_end(&mut collector,&data.models,&data.hitbox_mesh,&trajectory,state.time);
+
+	if state.move_state.is_no_clip(){
+		return collector.take();
+	}
+
 	//check for collision starts
 	let mut aabb=aabb::Aabb::default();
 	trajectory.grow_aabb(&mut aabb,state.time,collector.time());
@@ -1806,7 +1820,7 @@ fn atomic_internal_instruction(state:&mut PhysicsState,data:&PhysicsData,ins:Tim
 			match &mut state.move_state{
 				MoveState::Air
 				|MoveState::Water
-				|MoveState::Fly
+				|MoveState::Fly{..}
 				=>println!("ReachWalkTargetVelocity fired for non-walking MoveState"),
 				MoveState::Walk(walk_state)|MoveState::Ladder(walk_state)=>{
 					//velocity is already handled by extrapolated_body
@@ -1841,7 +1855,7 @@ fn atomic_input_instruction(state:&mut PhysicsState,data:&PhysicsData,ins:TimedI
 		Instruction::Mouse(_)
 		|Instruction::SetControl(_)=>{
 			match &state.move_state{
-				MoveState::Fly
+				MoveState::Fly{..}
 				|MoveState::Water
 				|MoveState::Walk(_)
 				|MoveState::Ladder(_)=>true,
@@ -1890,6 +1904,9 @@ fn atomic_input_instruction(state:&mut PhysicsState,data:&PhysicsData,ins:TimedI
 		},
 		Instruction::SetControl(SetControlInstruction::SetSprint(s))=>{
 			state.input_state.set_control(Controls::Sprint,s);
+			if let MoveState::Fly{no_clip}=&mut state.move_state{
+				*no_clip=s;
+			}
 		},
 		Instruction::Mode(ModeInstruction::Reset)=>{
 			//totally reset physics state
@@ -1935,11 +1952,12 @@ fn atomic_input_instruction(state:&mut PhysicsState,data:&PhysicsData,ins:TimedI
 		},
 		Instruction::Misc(MiscInstruction::PracticeFly)=>{
 			match &state.move_state{
-				MoveState::Fly=>{
+				MoveState::Fly{..}=>{
 					state.set_move_state(data,MoveState::Air);
 				},
 				_=>{
-					state.set_move_state(data,MoveState::Fly);
+					let no_clip=state.input_state.get_control(Controls::Sprint);
+					state.set_move_state(data,MoveState::Fly{no_clip});
 				},
 			}
 			b_refresh_walk_target=false;