Movie trailers are often a double-edged sword. On the one hand, they can give you a tantalising taste of what to expect from a film. On the other, they have the potential to completely ruin any element of surprise pertaining to a film's plot. Their existence forms a necessary element of every studio's marketing plans, but, sometimes, your experience with a film would be far greater by going in completely cold on details. Such is the case with the romantic comedy Palm Springs, which was a film this critic...