Tracing the limits of physical possibility in Traces
A video sampler of "Traces." Those in the theatrical know already know what to expect from Montreal's most "millennial" circus troupe, Les 7 Doigts de la Main ("The Seven Fingers of the Hand") - and they also know to seek out this off-handedly dazzling troupe whenever they perform locally (by now they're a mainstay of ArtsEmerson, which is hosting their latest, "Traces" through this weekend).But just in case you…