It's a kind of step. wasier to demonstrate than do. 4 beats to the bar, 2 hops with the other foot tapping the ground in front, change weight (feet together), pause. This is when danced standing in place, ranting to your partner. There is also a travelling rant, similar to a polka step (not turning).

You get lots of Contra in England too, E.g. one of the early evening Ceilidhs at Chippenham festival is a Zesty Contra. Called by Rhodri Davies. You need plenty of wind, some knowledge and a good deal of concentration.