The top of the box reads, "If this box SCREAMS, you WIN!"
There's a warning on top that reads "Open carefully! Box may scream!"
. . .
The box did, unfortunately, not scream.
On another note, this is probably one of the most disturbing and hilarious things I've seen recently. here is another story on the same thing. And here is a large picture of it.
Quite odd, neh?