Faked Moon Landings
If you put a tooth in a bowl of Coke it will melt overnight.
( Theoban What of it, Tue 19 May 2009, 16:11, archived)

I'll never forget Dawn French's version of this which was
"If you put a cow in a glass of milk, it wont be there in the morning"
( turb0t, Tue 19 May 2009, 16:16, archived)