Celebrity Gogglebox fans were reeling from Martin Kemp's "slap test" prank to see how serious his son Ronan's sunburn was.
The latest edition of the Channel 4 show saw some of Britain's best-loved celebrities including Lorraine Kelly, Clare Balding and Denise Van Outen curl up on the sofa.
The stars watched a whole host of TV ranging from ITV News, AppleTV+'s newest musical Schmigadoon! - and new Netflix dating programme, Sexy Beasts.
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But it was the father/son combo of Ronan and Martin Kemp who got fans talking.
At the start of the episode, Ronan was incredibly sunburnt from spending too long basking in this month's glorious heatwave.
After hobbling to his spot on the sofa, he began showing his dad his affected leg, and the Spandau Ballet musician couldn't believe his son managed to get so badly burnt.
He said: "You are so mad lying in the sun that long.
"You know there's a test to see if you're really sunburnt?"
Martin then proceeded to slap Ronan's exposed leg before erupting into hysterics while the Capital FM DJ was left wincing in pain.
And fans took to Twitter in fits of laughter at Martin's hands on prank.
Charlie tweeted: "Oh my god can’t believe Martin just slapped Romans leg. Must of bloody hurt #CelebrityGogglebox @romankemp"
Melaine said: "@realmartinkemp I love u but if you slapped my sunburn u would be pickin yer teeth up off the floor. Omg @romankemp how did u not punch yer dad. I will say tho, u are a dope for gettin that burnt. #CelebrityGogglebox"
Mike commented with a smiling face emoji: "Ouch"
Darren added: @realmartinkemp savage with the slap to @romankemp's sunburn! #CelebrityGogglebox
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