I used to teach climbing, and quickly learned the vast utility of the bowline knot...Bmf24 said:figure 8 knots are pretty qucik and easy to tie once you learn how. its the knot used the most in rock climbing. i have taken a couple good falls and always been able to untie the knot.
couple times I had to cut myself off the line w/figure 8's... but that's taking 10-15 footers about 50x a day... never had any trouble with 8's on hard days climbing in or outdoors.
I would prefer not to use an 8 on anything that was really getting torqued, just in case.