Toy Story Toons: Partysaurus Rex is a 2012 Pixar computer animated short film directed by Mark Walsh. It was first screened in theaters ahead of the 3-D theatrical re-release of Finding Nemo. Partysaurus Rex is the third short in the Toy Story Toons series, based on the characters from the Toy Story feature films. The other two films are Small Fry and Hawaiian Vacation. The short involves Rex getting left in the bathroom and making friends with bath toys.