Trailers Weekly: Piranha 3D, Buried, Jonah Hex, Toy Story 3 and More Dan Koelsch, May 1, 2010September 3, 2010 Trailers Weekly is a feature in which we bring you the most popular and talked about trailers of the week. Sharing trailers is a classic viral practice, and trailers are still the most mainstream way for people to learn about movies. This week we have the first trailers for Piranha…