I spent my entire summer learning how to use one of these things. If you want to learn how to flip then I suggest this site: http://www.balisongxtreme.com . Its fun to do and you can impress quite a few people with your skills. There are an infinite number of openings and closings. Some take 5 seconds, some take .5 seconds. If you want to buy one to use DONT BUY ONE FROM A FLEE MARKET OR PAWN SHOP. Theyll just break in a week. You gotta shell out money if you want a good one. Benchmade makes very high quality balisong that you can find for about $110. As for how to use one in a fight, its just like any other knife. P.S. Its my first post.
