Yeah, let’s sketch a quick, harmless “profile‑pic swap” prank. The idea is simple: you deploy a tiny contract that watches a specific trigger event—say a user clicking a “dangerous” button on a web page. When the event fires, the contract checks if the user’s address is in a whitelist; if not, it sends a transaction that replaces the user’s current avatar with a pre‑chosen meme image stored on IPFS. The swap is reversible, so the user can set their original pic back any time. The contract holds the meme URL in a public mapping, so it’s transparent and easy to audit. Keep the gas cost low by using a low‑gas fallback function, and add a “self‑destruct” self‑destruct timer so the prank can’t run forever. That’s it—quick, playful, and totally reversible, no real harm, just a good laugh.