diff --git a/assets/_regen_batches.json b/assets/_regen_batches.json
index ca8a844..cdbc423 100644
--- a/assets/_regen_batches.json
+++ b/assets/_regen_batches.json
@@ -223,5 +223,13 @@
     ],
     "anchor": 0,
     "subject": "One frame of a zombie spectator in a grey-brown coat who has just had his wooden folding chair knocked DOWN out of his hands \u2014 the chair is falling beside him and he is staggering with his arms up \u2014 drawn as coarse low-resolution pixel art."
+  },
+  "boy_run_2": {
+    "sprites": [
+      "x_boyrun3",
+      "x_boyrun4"
+    ],
+    "anchor": 0,
+    "subject": "Two frames of the same young ball boy in a white polo shirt and shorts sprinting across a tennis court, two further stages of the same run cycle, drawn as coarse low-resolution pixel art."
   }
 }
\ No newline at end of file
diff --git a/assets/x_boyrun3.png b/assets/x_boyrun3.png
index c8a85b3..e75666e 100644
Binary files a/assets/x_boyrun3.png and b/assets/x_boyrun3.png differ
diff --git a/assets/x_boyrun4.png b/assets/x_boyrun4.png
index 7be9df5..f497384 100644
Binary files a/assets/x_boyrun4.png and b/assets/x_boyrun4.png differ
diff --git a/assets/z_gw.png b/assets/z_gw.png
index ae1fd81..ebe8ced 100644
Binary files a/assets/z_gw.png and b/assets/z_gw.png differ
diff --git a/assets/z_gw2.png b/assets/z_gw2.png
index cb5706c..2b9729d 100644
Binary files a/assets/z_gw2.png and b/assets/z_gw2.png differ
diff --git a/assets/z_gw3.png b/assets/z_gw3.png
index 843fe01..5931453 100644
Binary files a/assets/z_gw3.png and b/assets/z_gw3.png differ
diff --git a/assets/z_gw4.png b/assets/z_gw4.png
index 0aaceb5..4d8784e 100644
Binary files a/assets/z_gw4.png and b/assets/z_gw4.png differ
diff --git a/assets/z_s1.png b/assets/z_s1.png
index 0241a6d..3279111 100644
Binary files a/assets/z_s1.png and b/assets/z_s1.png differ
diff --git a/assets/z_s2.png b/assets/z_s2.png
index d46b694..decf1c1 100644
Binary files a/assets/z_s2.png and b/assets/z_s2.png differ
diff --git a/assets/z_s3.png b/assets/z_s3.png
index c4387a2..67dce3f 100644
Binary files a/assets/z_s3.png and b/assets/z_s3.png differ
diff --git a/assets/z_s4.png b/assets/z_s4.png
index fa79dfd..237b182 100644
Binary files a/assets/z_s4.png and b/assets/z_s4.png differ
diff --git a/assets/z_sdown.png b/assets/z_sdown.png
index 4863327..b6a86f6 100644
Binary files a/assets/z_sdown.png and b/assets/z_sdown.png differ
diff --git a/index.html b/index.html
index 011ec73..225d8bc 100644
--- a/index.html
+++ b/index.html
@@ -97,6 +97,6 @@
     <p id="build"></p>
   </div>
 </div>
-<script type="module" src="main.js?v=69"></script>
+<script type="module" src="main.js?v=70"></script>
 </body>
 </html>
diff --git a/render.js b/render.js
index 62dacbc..2a905d5 100644
--- a/render.js
+++ b/render.js
@@ -155,7 +155,7 @@ export function proj(x, y, z) {
 
 // ---------------------------------------------------------------- sprites ----
 // assets/<name>.png; game falls back to code-drawn figures until sprites load.
-const SPRV = 63; // asset cache-buster — bump with main.js?v=N (see the img.src note below)
+const SPRV = 64; // asset cache-buster — bump with main.js?v=N (see the img.src note below)
 const SPR = {};
 for (const n of ['p_idle1','p_idle2','p_bounce','p_bounce2','p_toss','p_smash','p_run1','p_run2','p_run3','p_run4','p_swing1','p_swing2','p_die1','p_die2','p_die3','p_die4','p_die5',
                  'o_idle1','o_idle2','o_bounce','o_bounce2','o_toss','o_smash','o_run1','o_run2','o_swing1','o_swing2',