John Stamos revisited the San Francisco home from his Full House days on Friday, Mar. 6, but some fans failed to notice him -- see the amazing photo!

Boy, these youngsters have 0.0 idea what they're missing. #Fullhousehouse. #TURNAROUND.

A photo posted by John Stamos (@johnstamos) on Mar 6, 2015 at 4:23pm PST

Have mercy! John Stamos revisited the San Francisco home where his beloved '80s show Full House was set on Friday, Mar. 6. But instead of breaking out some tunes by The Beach Boys, the actor decided to prank some fans that happened to be doing the same thing.

"Boy, these youngsters have 0.0 idea what they're missing," he captioned an Instagram photo. "#Fullhousehouse. #TURNAROUND."

Stamos, 51, stood outside the house while facing a camera. He kept a low profile in a black outfit, sunglasses, and hat. Meanwhile, three unsuspecting fans kept their eyes fixated on the home behind him, having no clue that they were feet away from thee Uncle Jesse.

Stamos played Jesse Katsopolis on the family series from 1987 to 1995, and has remained close with his costars. More recently, the cast reunited at Dave Coulier's July 2014 wedding, and supported Candace Cameron Bure during her Dancing With the Stars season 18 stint.

Full House also starred Bob Saget, Jodie Sweetin, Mary-Kate and Ashley Olsen, Andrea Barber, and Lori Loughlin.