diff --git a/src/physics.rs b/src/physics.rs
index 3f4fbd8c..38d71ff7 100644
--- a/src/physics.rs
+++ b/src/physics.rs
@@ -104,7 +104,10 @@ impl InputState{
 		&self.next_mouse
 	}
 	fn set_next_mouse(&mut self,next_mouse:MouseState){
-		(self.next_mouse,self.mouse)=(next_mouse,self.next_mouse.clone());
+		//I like your functions magic language
+		self.mouse=std::mem::replace(&mut self.next_mouse,next_mouse);
+		//equivalently:
+		//(self.next_mouse,self.mouse)=(next_mouse,self.next_mouse.clone());
 	}
 	fn replace_mouse(&mut self,mouse:MouseState,next_mouse:MouseState){
 		(self.next_mouse,self.mouse)=(next_mouse,mouse);