diff --git a/strafe-client/src/mouse_interpolator.rs b/strafe-client/src/mouse_interpolator.rs
index 07d2c4c..c28665f 100644
--- a/strafe-client/src/mouse_interpolator.rs
+++ b/strafe-client/src/mouse_interpolator.rs
@@ -37,6 +37,8 @@ pub struct MouseInterpolator{
 	session_timeline:std::collections::VecDeque<TimedInterpolatorInstruction>,
 	physics_timeline:std::collections::VecDeque<TimedPhysicsInstruction>,
 }
+// Maybe MouseInterpolator manipulation is better expressed using impls
+// and called from Instruction trait impls in session
 impl InstructionConsumer<Instruction> for MouseInterpolator{
 	type TimeInner=SessionTimeInner;
 	fn process_instruction(&mut self,ins:TimedInterpolatorInstruction){
@@ -66,7 +68,8 @@ impl MouseInterpolator{
 		// new input
 	}
 	pub fn drop_output<'a>(&mut self,ins:TimedInstruction<DropInstruction<'a>,SessionTimeInner>){
-		//
+		// so the idea is that Session gets in the middle of MouseInterpolator instruction processing
+		// and injects its own side effects, notably running physics
 	}
 	pub fn next_output(&self,time_limit:SessionTime)->Option<TimedInstruction<DropInstruction<'_>,SessionTimeInner>>{
 		None