Clients, ever play an April Fool's Day prank on a provider?

Providers, ever play an April Fool's Day prank on a client?

Told one of my regulars when I showed up for a session that I seemed to be getting a genital wart, and since I just saw her a few days ago and we did some P2P, she should probably get checked out.  She nearly fainted,  Then when I started laughing, she realized I was joshing her, and I got a small bruise now where she punched me.