A loner who thinks he’s been cheated by a mortgage firm takes the president of the company hostage, in a story based on actual events in 1977. The 1970s have, for quite awhile now, become a common time frame for American period films. That decade saw the youth counterculture emerge into the mainstream in clothing, lingo, long hair, and a tendency towards the weird and marginal, with multiple challenges to the status quo. It’s a fertile setting for satiric commentary on America. Moreover, the ‘70s were a period when filmmaking broke through the old studio taboos, resulting in an amazing…