Itg's probably something every single person alive has done at least once, so you can figure out how true it is from there! Certainly any parent will tell you that no child would survive babyhood, and no-one who has a little too much to drink would live to tell the tale. Where do these ideas come from!
No, it isn't true. CBBC have been running trailers featuring this "fact", but considering another trailer in the same vein is repeating the ancient, long-debunked canard about swallowing x number of spiders, I would suggest that their research has been somewhat less than exhaustive.