March 11, 2014 at 01:24 PM EDT

Watch your back, George Clooney: You’re not the only star who smolders and loves a good practical joke.

On Monday, Jon Hamm followed up his recent Saturday Night Live cameo by participating in a new Tonight Show bit. As Jimmy Fallon explained, the show had had asked tourists to pose on the “Top of the Rock” — the roof of the building where Fallon tapes — for pictures that would be used to promote Rockefeller Center. Naturally, people agreed — but when it came time to say “cheese,” Hamm appeared behind them, striking the perfect pose to ruin enhance the shot.

Watch below, and ponder whether you’d ever forgive yourself if you were that close to Don Draper and didn’t even know it:

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