When Barbara is about to kiss Eddie (as Judge Parker) under a tree near their soon-to-be-built home, he stops her, walks away, and then stands near an empty rectangular wooden frame. On a following shot, though, he is standing in an open piece of ground, and the rectangular wooden frame is no longer there.
When Eddie (as Judge Parker) first meets Barbara, he calls her Rosie. However, during their getaway retreat, when he stops Barbara from kissing him and confesses that he is all mixed up, he calls her Peggy.
In the scene set on a new construction site, the trees in the background are an obvious painted backdrop.
Upon arriving in hell, Eddie complains of the smell of rotten eggs. A "chemist" states that this is due to H2SO4, which he unconventionally calls "hydrogen sulfuric acid". H2SO4 is sulfuric acid, and it does not smell like rotten eggs; hydrogen sulfide (H2S) produces the rotten-egg smell.