A man in central England pranked his mom by replacing a framed photograph of himself with a portrait of North Korean dictator Kim Jong Un.

Ben Slater, from Derby, then waited for more than two weeks for his mother to notice. The ruse finally ended after his brother, Jake Slater, posted this to Twitter on Friday:

My brother's changed his photo on the staircase to Kim Jong-un and my mum still hasn't noticed after 2 weeks pic.twitter.com/0zuR0Kuh9x — Jake (@Slatez_) May 5, 2017

The post went viral and soon came to their mom’s attention.

“Someone showed her my tweet,” Jake Slater told Mashable. “But she said if she wasn’t shown it then it could of been up there for years and she still wouldn’t of had a clue.”

As of Tuesday morning, the tweet had garnered more than 145,000 likes.

Some Twitter users pointed out that they’d pulled similar stunts in the past:

@Slatez_ 😂Love it! I did a similar thing with this picture in our kitchen, no one noticed for ages. pic.twitter.com/fFWHSgkJSx — Nigel Cain (@Nigemode) May 6, 2017

@Nigemode @Slatez_ Not purposefully in the house of some friends, they have a picture of Tolkien and everybody asked who was he the greatfather of. — alejandro rivero (@arivero) May 6, 2017

@Slatez_ @piersmorgan Done a similar thing last year with my sisters graduation photo, took my mum 12 weeks until she noticed 😂 pic.twitter.com/D3M4lSNn1Q — Luis Morgan Tapper (@LuisTapper) May 6, 2017

@Slatez_ @NickMotown Son did that on April 1st. Husband & I didn't notice either. He must just have one of those faces!? — Maggie Hillier (@hillier_maggie) May 6, 2017

@Slatez_ @Ex_Lekkerjente A colleague took a photo from my wall of fame,drew a bishop`s cross on my chest. Put photo right back up again. Took me 6 months to notice. — Tove Kjellerød (@ToveKje) May 6, 2017