Actually, there is a LOT more that goes in to using a parachute. In fact, at least 2.5 hours of speaking worth! haha I was quite shocked.
The seminar, put on by Allen Silver of Silver Parachutes, was quite informative and I highly recommend you check out these articles published by Allen: http://www.silverparachutes.com/articles.html
There is a LOT more to using these parachutes than just tightning some straps and pulling a ring.
I'm quite glad to say that my instructors safety briefing(s) included a lot of what Allen said at our seminar. Allen told us of many different accidents and how they happened. Parachutes are a lot like airplanes.... all it takes is one simple incorrect decision to break the entire chain.