With the housemates confined to the large task room after the flood earlier in the night, David set about causing mischief when Sam fell asleep.
The Welshman crawled along the floor and let the air out of the makeshift bed that had been supplied by Big Brother. It wasn't long before the 21-year-old realised though. "That's not fucking funny is it?" he said.
Corin, who has been the victim of pranks by Sam in recent days, responded: "If you can't take it, don’t give it."
Sam was informed by John James that there was a spare airbed he could use but the graffiti artist didn't look too pleased with David's practical joke.