 In the scene where the Hobbits return to Hobbiton, three of the  hobbits had slight problems during the shoot. Elijah Wood (qv) had  a hard time controlling his pony, Sean Astin (qv) was allergic to  the ponies, and Dominic Monaghan (qv) was in a really bad mood  because of technical aspects revolving around the scene.  Billy Boyd (I) (qv) was "in stitches" during the shoot.