Re-occuring Stewart reference. Presumably in refererance to the to a character in the 1964 move Dreamscape. Any time a charater related to or who is reminiciant of a snake, Stewart will say "snakeman", often without context, presumably reference to this movie, which features a half man/half-snake monster who apears to the hero in a dream. And there's also the snakeman from Jonah Hex.