diff --git a/src/Dodge/Base/Collide.hs b/src/Dodge/Base/Collide.hs
index 332545a2b..8c878956b 100644
--- a/src/Dodge/Base/Collide.hs
+++ b/src/Dodge/Base/Collide.hs
@@ -18,7 +18,6 @@ module Dodge.Base.Collide (
     collideCircWalls,
     overlapSegWalls,
     overlapSegCrs,
-    --    bounceBall,
     bouncePoint,
     circOnSomeWall,
     circOnAnyCr,
@@ -37,12 +36,12 @@ module Dodge.Base.Collide (
     collide3,
 ) where
 
-import Data.Monoid
 import Control.Lens
 import Control.Monad
 import qualified Data.IntSet as IS
 import Data.List (sortOn)
 import Data.Maybe
+import Data.Monoid
 import Dodge.Base.Wall
 import Dodge.Creature.Radius
 import Dodge.Data.Object
@@ -261,10 +260,6 @@ collideCircWalls sp ep rad = foldl' findPoint (ep, Nothing)
             . shiftbyrad
             . _wlLine
             $ wl
-    --    shiftbyrad (a, b) =
-    --            ( a +.+ rad *.* normalizeV (a -.- b)
-    --            , b +.+ rad *.* normalizeV (b -.- a)
-    --            )
     shiftbyrad (a, b) =
         bimap
             f
@@ -299,7 +294,12 @@ circOnAnyCr :: Point2 -> Float -> World -> Bool
 {-# INLINE circOnAnyCr #-}
 circOnAnyCr p r w = IS.foldr f False $ crIXsNearPoint p w
   where
-    f cid bl = maybe False (\cr -> dist p (cr ^. crPos . _xy) < r + crRad (cr ^. crType)) (w ^? cWorld . lWorld . creatures . ix cid) || bl
+    f cid bl =
+        maybe
+            False
+            (\cr -> dist p (cr ^. crPos . _xy) < r + crRad (cr ^. crType))
+            (w ^? cWorld . lWorld . creatures . ix cid)
+            || bl
 
 -- | More general collision tests follow
 hasLOS :: Point2 -> Point2 -> World -> Bool
@@ -325,13 +325,16 @@ hasLOSIndirect p1 p2 =
         . collidePointTestFilter wlIsOpaque p1 p2
         . wlsNearSeg p1 p2
 
+isFlyable :: Point2 -> Point2 -> World -> Bool
+{-# INLINE isFlyable #-}
+isFlyable p1 p2 =
+    not
+        . collidePointTestFilter (not . (^?! wlPathable)) p1 p2
+        . wlsNearSeg p1 p2
+
 isWalkable :: Point2 -> Point2 -> World -> Bool
 {-# INLINE isWalkable #-}
-isWalkable p1 p2 w =
-    (not
-        . collidePointTestFilter (not . (^?! wlPathable)) p1 p2
-        . wlsNearSeg p1 p2 $ w)
-    && not (getAny $ foldMap f (w ^. cWorld . chasms))
+isWalkable p1 p2 w = isFlyable p1 p2 w && not (getAny $ foldMap f (w ^. cWorld . chasms))
   where
     f = foldMap (Any . isJust . uncurry (intersectSegSeg p1 p2)) . loopPairs
 
@@ -339,8 +342,8 @@ canSee :: Int -> Int -> World -> Bool
 {-# INLINE canSee #-}
 canSee i j w = hasLOS p1 p2 w
   where
-    p1 = w ^?! cWorld . lWorld . creatures . ix i . crPos . _xy -- _crPos (_creatures (_cWorld w) IM.! i)
-    p2 = w ^?! cWorld . lWorld . creatures . ix j . crPos . _xy -- _crPos (_creatures (_cWorld w) IM.! j) -- unsafe
+    p1 = w ^?! cWorld . lWorld . creatures . ix i . crPos . _xy
+    p2 = w ^?! cWorld . lWorld . creatures . ix j . crPos . _xy
 
 canSeeIndirect :: Int -> Int -> World -> Bool
 {-# INLINE canSeeIndirect #-}
@@ -362,5 +365,3 @@ anythingHitCirc rad sp ep w = hitCr || circHitWall sp ep rad w
             (\cr -> intersectCircSegTest (cr ^. crPos . _xy) (rad + crRad (cr ^. crType)) sp ep)
             (w ^? cWorld . lWorld . creatures . ix cid)
             || bl
-
--- this should probably be wallsOnLine or something