In reply to Davon: There has probably been more written on the internet about self-belaying in the last two decades than on any climbing related topic - and that even includes debate about the grade of Three Pebble Slab...
To save you the bother, I'll give you a quick summary of the 34,456,568 previous posts on the subject, including those from the deepest darkest depths of usenet...
- Most people don't die, apart from those that do
- There are lots of ways to do it; there is only one way to do it
- It's really safe; it's not really safe; it's really not safe (well out of 34,456,568 conflicting posts, someone must be right)
- Seventy three and a third different people will tell you that fourteen and a half varied methods, some possibly even including mystical incantations, work for them
- Someone will recommend a method they don't use but would have used theoretically five years ago despite not having climbed since Denali in '79.
- 47 people will tell you that various previous posters have a death wish and are 'GONNA DIE!!!'
- A pedant will complain about the capital letters, spelling and excessive punctuation.
- A genuine master in pedantry will then correct the previous pedants grammar.
- Someone will post a link to the dated Lyon Equipment report or the Petzl website to demonstrate that Shunts are a death-trap waiting to happen.
- Someone else will say state they've use a Shunt since before they were invented and they aren't going to change
- At that point a link to a video will be posted that shows <insert latest famous climber> ignoring absolutely everything anyone has said about redundancy and working a route using just a GriGri.
- The thread will diverge to solo lead climbing and the mythical Wren Silent Partner.
- Various people will return to topic and recommend a Troll Rocker (camming ascender) as the best thing for your back-up - far safe than the 'deadly' Shunt and smoother than the awkward Microcender that Petzl now recommend.
- 9 posters will race to remind everyone that Troll no longer exists but ISC now make them.
- A bright spark will mention that DMM's equivalent is the 'Buddy'.
- Finally, common sense will prevail and someone tell you from personal experience that it is just all too much hassle and it's just far easier to find a proper buddy to climb with.
PS In all seriousness, just read the excellent Petzl link above...