You're not wrong, here's an old one...
Standing in the kitchen getting breakfast, AGFW™ decides to come and get a cup of tea.
Other workmate goes outside to check something on his bike. and while he's out there, AGFW™ walks over to the window, taps on the glass at other workmate, making other workmate look, which causes AGFW™ to burst into giggles
Like...AGFW™ actually just played peek-a-boo. He's in his 40s.