You do that (turn it upside down) with a figure of St Joseph if you want to sell a house. You bury it too, which must surely be an additional inducement for results!
Re the St Anthony thing though, I was reading a book of short, well, blogs I think you'd call them, by Marian Keyes, including one where she'd lost her passport just before she had to go to New York. She went to the Irish Consulate and one of the things she was apparently asked, in all seriousness, was if she'd asked St Anthony for the safe return of said missing passport. It was only when she assured the staff member that yes, she had, as had her mum, without success, that the passport was in fact deemed to be truly lost and another issued.
Of course, I would imagine that there is much literary license in this story, but it's an amusing one nonetheless