Pichenettes is a comic strip in the series The Spiffy Adventures of McConey (Les formidables aventures de Lapinot), by the popular French cartoonist Lewis Trondheim.
This volume is often regarded by fans as one of the funniest and strongest entries in the series.
While walking on the street, Lapinot and Richard accidentally bumped into a bum who is about to commit suicide.
Lapinot accepted the stone, and most people around him started to be plagued with bad luck without him noticing, because he did not take the warning seriously.
Up until the end of the book, it is not clear whether the curse is real or just a product of the characters’ imagination.