IMPULSE is an under-appreciated and little-seen US horror flick of the early 1980s. It's no masterpiece - the budget is a little too cheap and the pace is a little too slow for that - but it works a treat as a story in the Stephen King mould, with a small town being assailed by a mysterious virus which forces people to give into their worst impulses. It also reminded me of James Herbert's THE FOG a little. The capture of small town behaviour is well realised, while the various set-piece sequences really stand out, with the berserk sheriff being a highlight. The strong cast includes Tim Matheson, the great Bill Paxton, and Meg Tilly, who as anyone who has seen PSYCHO II will know, is a fine actress.