diff --git a/lib/managers/collision_manager.rb b/lib/managers/collision_manager.rb
index 1359953..10c5d4c 100644
--- a/lib/managers/collision_manager.rb
+++ b/lib/managers/collision_manager.rb
@@ -56,16 +56,16 @@ class IMICFPS
       broadphase.each do |entity, _collisions|
         _collisions.each do |ent|
           # aabb vs aabb
-          next unless entity.bounding_box.intersect?(ent.bounding_box)
+          # next unless entity.bounding_box.intersect?(ent.bounding_box)
           # entity model aabb tree vs ent model aabb tree
-          ent_tree_search = ent.model.aabb_tree.search(localize_entity_bounding_box(entity, ent), true)
-          next if ent_tree_search.size == 0
+          # ent_tree_search = ent.model.aabb_tree.search(localize_entity_bounding_box(entity, ent), true)
+          # next if ent_tree_search.size == 0
 
           # puts "#{ent.class} -> #{ent_tree_search.size} (#{Gosu.milliseconds})"
 
-          entity.position.y = ent_tree_search.first.object.vertices.first.y if entity.is_a?(Player) && ent.is_a?(Terrain)
+          # entity.position.y = ent_tree_search.first.object.vertices.first.y if entity.is_a?(Player) && ent.is_a?(Terrain)
 
-          @collisions[entity] = _collisions
+          # @collisions[entity] = _collisions
         end
       end
     end
diff --git a/lib/managers/physics_manager.rb b/lib/managers/physics_manager.rb
index 4a244a8..0483c9a 100644
--- a/lib/managers/physics_manager.rb
+++ b/lib/managers/physics_manager.rb
@@ -32,6 +32,7 @@ class IMICFPS
           entity.velocity.y = 0
         else
           entity.velocity.y -= @collision_manager.map.gravity * entity.delta_time if entity.manifest.physics
+          entity.velocity.y = 0 if entity.velocity.y < 0
         end
       end
     end
diff --git a/lib/model.rb b/lib/model.rb
index e43439d..67813ae 100644
--- a/lib/model.rb
+++ b/lib/model.rb
@@ -55,7 +55,7 @@ class IMICFPS
       end
 
       start_time = Process.clock_gettime(Process::CLOCK_MONOTONIC, :float_millisecond)
-      build_collision_tree
+      # build_collision_tree
       puts "    Building mesh collision tree took #{((Process.clock_gettime(Process::CLOCK_MONOTONIC, :float_millisecond)-start_time)/1000.0).round(2)} seconds" if $debug.get(:stats)
     end