diff --git a/assets/_sheet_cpu34.png b/assets/_sheet_cpu34.png
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diff --git a/assets/_sheet_shield34.png b/assets/_sheet_shield34.png
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index 0000000..36c6ee9
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diff --git a/assets/z_c2.png b/assets/z_c2.png
index e8ef971..7a26b51 100644
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diff --git a/assets/z_c3.png b/assets/z_c3.png
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diff --git a/assets/z_c4.png b/assets/z_c4.png
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index 0000000..77b54cd
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diff --git a/assets/z_s3.png b/assets/z_s3.png
index 4863327..c4387a2 100644
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diff --git a/assets/z_s4.png b/assets/z_s4.png
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diff --git a/assets/z_sdown.png b/assets/z_sdown.png
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diff --git a/index.html b/index.html
index 2ee4c9e..1f1bd19 100644
--- a/index.html
+++ b/index.html
@@ -97,6 +97,6 @@
     <p id="build"></p>
   </div>
 </div>
-<script type="module" src="main.js?v=61"></script>
+<script type="module" src="main.js?v=62"></script>
 </body>
 </html>
diff --git a/render.js b/render.js
index 34d3540..de3cf74 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 = 56; // asset cache-buster — bump with main.js?v=N (see the img.src note below)
+const SPRV = 57; // 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',
                  'o_idle1','o_idle2','o_bounce','o_bounce2','o_toss','o_smash','o_run1','o_run2','o_swing1','o_swing2',
@@ -171,7 +171,9 @@ for (const n of ['p_idle1','p_idle2','p_bounce','p_bounce2','p_toss','p_smash','
                  'z_a1','z_a2','z_a3','z_a4','z_b1','z_b2','z_b3','z_b4','z_c1','z_c2',
                  'z_d1','z_d2','z_d3','z_d4', // the steward: bigger body, hi-vis vest, 4-frame walk
                  'z_awb','z_bwb','z_cw1b','z_cw2b','z_dw','z_dwb', // ...and every wound skin's second frame: wounded bodies walk too
-                 'z_f1','z_f2','z_f3','z_f4','z_g1','z_g2','z_g3','z_g4','z_gw','z_s1','z_s2','z_s3',
+                 'z_f1','z_f2','z_f3','z_f4','z_g1','z_g2','z_g3','z_g4','z_gw',
+                 'z_s1','z_s2','z_s3','z_s4','z_sdown', // the chair spectator: 4-frame shuffle + the staggered pose
+                 'z_c3','z_c4',                         // ...and the turned CPU walks on four frames too
                  'z_cw1','z_cw2','z_aw','z_bw', // wounded skins for multi-hit enemies (racket boss, brute, and now the classic shamblers)
                  'w_ball','w_bomb','w_triple','w_fire','w_gun', // weapon-rack icons
                  'scoreboard']) {
@@ -264,7 +266,7 @@ function drawBoy(b) {
 // for 'z_g-1' — a sprite that does not exist, and drawStatic silently draws nothing. That is the
 // blinking Oliver saw on the way in, on exactly the bodies that step off distance: brutes and bosses.
 const stepFrame = (v, n) => ((Math.floor(v) % n) + n) % n; // 0..n-1, whatever the sign of v
-const ZFRAMES = { a: 4, b: 4, f: 4, d: 4, g: 4 }; // 4-frame walk cycles where sheets exist; the rest stay 2
+const ZFRAMES = { a: 4, b: 4, f: 4, d: 4, g: 4, s: 4, c: 4 }; // 4-frame walk cycles where sheets exist; the rest stay 2
 // The rogue ball machine, on its own generated sheet: a dented hopper cart on wheels with a barrel
 // aimed down-court, and a second frame with the muzzle flashing. Oliver called the first, procedural
 // version "naively painted" — it was four rects, which is fine for fire but not for furniture the
@@ -303,13 +305,15 @@ function drawZombie(zb) {
                                                                                 // WALKED, like its wound lurch below,
                                                                                 // or the feet slide (same cycle length)
     : Math.floor(zb.walkT * (zb.variant === 'f' ? 6 : 2.6) * N / 2) % N + 1;
-  if (zb.variant === 's' && zb.shieldT > 0) frame = 3; // chair dropped — hit it NOW
+  const chairDown = zb.variant === 's' && zb.shieldT > 0; // chair dropped — hit it NOW. Its own sprite
+                                                         // now (z_sdown); it used to be walk frame 3,
+                                                         // which a 4-frame cycle would walk right through
   let h = zb.variant === 'g' ? 2.7 : zb.variant === 'd' ? 2.15 : rk ? 1.85 : 1.8; // the brute towers half again over the crowd; the steward stands between him and it
   if (zb.variant === 'B') h = 1.8 * (zb.scale || 1.5);  // ...and a chapter boss towers over the brute
   // wounded skins: multi-hit enemies show their damage as hp drops (arm off → head gone, still
   // shambling). The blood is NOT painted in — open wounds gush live particles (see bleed() in
   // zombies.js). Fall back to the healthy sprite until the wounded PNG has loaded.
-  let name = 'z_' + v + frame;
+  let name = chairDown && SPR.z_sdown ? 'z_sdown' : 'z_' + v + frame;
   if (zb.variant === 'g' && zb.hp < TUNE.bruteHp) { // one arm → both → head gone → ribs out
     const stage = ['z_gw4', 'z_gw3', 'z_gw2', 'z_gw'][Math.max(0, Math.min(3, zb.hp - 1))];
     if (SPR[stage]) {