The core audience for “American Ultra” (2015) is 20-year-old gamer types, not 50-year-old stay-at-home-on-a-Friday-night types. I get that. It was a wise move, since the gamers paid $10 to watch it in a theater, while I paid 60 cents to rent it from Redbox (and stay at home on a Friday night). So the fact I thought the violence was waaay too cartoonishly bloody means little. The fact I thought said violence put a damper on the ingeniously compelling story of a sleeper-cell stoner means little. I’m sure the gamers ate it up. My reward? Friday night with Connie Britton.