Randy Peterson, the stuntman who doubled for Sam Rockwell in the dive off the bridge early in the film, performed the stunt a total of six times - five times completely naked, and once wearing briefs (in case an alternative shot would be needed for a US TV version). The bridge (in Louisville, Kentucky, USA) was 70 feet high and the water around nine feet deep.
When Devon pours a glass of water for Trent it is less than half full. In the next scene outside it is seen to be more than half full even after splashing it about.
Devon refers to Baba Yaga as "he" several times and describes the character as having chicken legs, however, in Russian fairy tales/folklore Baba Yaga is an old woman and gets around by flying in a mortar and pestle, it is her house that runs about on chicken legs.