Numerous onlookers watch the spectacle every year when Krampus and Perchten parade through Innsbruck's old town and Christmas markets with their scary masks. If that's too wild for you, you might prefer to come to the entrance of St. Nicholas, who is flanked by his angels (and a good Krampus) and brings small gifts for children.
...you can hide well between the market stalls of the Christmas market in Innsbruck when the Krampus and Perchten parade through the city.