diff --git a/src/timelines/TootList.tsx b/src/timelines/TootList.tsx
index caaf4c3..38670e2 100644
--- a/src/timelines/TootList.tsx
+++ b/src/timelines/TootList.tsx
@@ -13,7 +13,6 @@ import { useDefaultSession } from "../masto/clients";
 import { useHeroSource } from "../platform/anim";
 import { HERO as BOTTOM_SHEET_HERO } from "../material/BottomSheet";
 import { setCache as setTootBottomSheetCache } from "./TootBottomSheet";
-import { useNavigate } from "@solidjs/router";
 import RegularToot, {
   findElementActionable,
   findRootToot,
@@ -21,6 +20,21 @@ import RegularToot, {
 import cardStyle from "../material/cards.module.css";
 import type { ThreadNode } from "../masto/timelines";
 import { useNavigator } from "../platform/StackedRouter";
+import { ANIM_CURVE_STD } from "../material/theme";
+
+function durationOf(rect0: DOMRect, rect1: DOMRect) {
+  const distancelt = Math.sqrt(
+    Math.pow(Math.abs(rect0.top - rect1.top), 2) +
+      Math.pow(Math.abs(rect0.left - rect1.left), 2),
+  );
+  const distancerb = Math.sqrt(
+    Math.pow(Math.abs(rect0.bottom - rect1.bottom), 2) +
+      Math.pow(Math.abs(rect0.right - rect1.right), 2),
+  );
+  const distance = distancelt + distancerb;
+  const duration = distance / 1.6;
+  return duration;
+}
 
 function positionTootInThread(index: number, threadLength: number) {
   if (index === 0) {
@@ -41,7 +55,7 @@ const TootList: Component<{
   const session = useDefaultSession();
   const heroSrc = useHeroSource();
   const [expandedThreadId, setExpandedThreadId] = createSignal<string>();
-  const {push} = useNavigator();
+  const { push } = useNavigator();
 
   const onBookmark = async (status: mastodon.v1.Status) => {
     const client = session()?.client;
@@ -100,7 +114,7 @@ const TootList: Component<{
 
   const openFullScreenToot = (
     toot: mastodon.v1.Status,
-    srcElement?: HTMLElement,
+    srcElement: HTMLElement,
     reply?: boolean,
   ) => {
     const p = session()?.account;
@@ -116,12 +130,55 @@ const TootList: Component<{
 
     const acct = `${inf.username}@${p.site}`;
     setTootBottomSheetCache(acct, toot);
+
     push(`/${encodeURIComponent(acct)}/toot/${toot.id}`, {
-      state: reply
-        ? {
-            tootReply: true,
-          }
-        : undefined,
+      animateOpen(element) {
+        const rect0 = srcElement.getBoundingClientRect(); // the start rect
+        const rect1 = element.getBoundingClientRect(); // the end rect
+
+        const duration = durationOf(rect0, rect1);
+
+        const keyframes = {
+          top: [`${rect0.top}px`, `${rect1.top}px`],
+          bottom: [`${rect0.bottom}px`, `${rect1.bottom}px`],
+          left: [`${rect0.left}px`, `${rect1.left}px`],
+          right: [`${rect0.right}px`, `${rect1.right}px`],
+          height: [`${rect0.height}px`, `${rect1.height}px`],
+          margin: 0,
+        };
+
+        srcElement.style.visibility = "hidden";
+
+        const animation = element.animate(keyframes, {
+          duration,
+          easing: ANIM_CURVE_STD,
+        });
+        return animation;
+      },
+
+      animateClose(element) {
+        const rect0 = element.getBoundingClientRect(); // the start rect
+        const rect1 = srcElement.getBoundingClientRect(); // the end rect
+
+        const duration = durationOf(rect0, rect1);
+
+        const keyframes = {
+          top: [`${rect0.top}px`, `${rect1.top}px`],
+          bottom: [`${rect0.bottom}px`, `${rect1.bottom}px`],
+          left: [`${rect0.left}px`, `${rect1.left}px`],
+          right: [`${rect0.right}px`, `${rect1.right}px`],
+          height: [`${rect0.height}px`, `${rect1.height}px`],
+          margin: 0,
+        };
+
+        srcElement.style.visibility = "";
+
+        const animation = element.animate(keyframes, {
+          duration,
+          easing: ANIM_CURVE_STD,
+        });
+        return animation;
+      },
     });
   };