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Advice to anyone visiting a famous TV landmark: Look around. You never know what you might see. Or who.

John Stamos has posted a photo on Instagram in which he is standing outside the Full House house in the Pacific Heighs neighborhood of San Francisco, mere inches away from fans who are too busy gawking at the domicile (only the facade of which was seen on the show) to notice Uncle Jesse, who is clad in a black shirt with a camera around his neck. “Boy, these youngsters have 0.0 idea what they’re missing. #Fullhousehouse. #TURNAROUND,” he wrote as the caption.

The ABC family comedy that ran from 1987 to 1995 will celebrate the 30th anniversary in two and a half years, so maybe he’ll come back and do it again then. But probably best to play it safe and keep walking by daily, just in case.