Some plays are a social commentary on the past or the present, then some plays are witty and intelligent using their razor-edged lines to make sharp cuts in your mind and then some plays are just for fun. The play, Peter Colley’s “I’ll be back before midnight” does not promise to be anything other than your average edge-of-the-seat thriller, and it succeeds in that promise. A remote house, quirky neighbor, nervous wife, incest, and paranoia–are…