I don't think looking big means a thing to a boar. You're still going to look like a weak human to the bear who knows it can eat you.

It might also look like a sign of aggression to the bear. Maybe it will work on a young bear, but I wouldn't count on it for a mature boar.

Democracy is two wolves and a lamb voting on what to have for lunch.
Liberty is a well-armed lamb contesting the outcome of the vote.