Originally Posted by Slacker
I've heard it said that it is the most useless bag in the gym.
I use it because its seems to work out different muscles than the other bags, and build hand hand speed.
Recently I was watching a pro in our gym use it and he would occasionally step into it while he had it going and practice slips and head movement. I'd never seen anyone do that, and thought it was interesting.
Something I read recently said something like speed bag builds hand speed, double end bag builds rhythm/timing and the heavy bag builds power.
Dunno if that helps, but that's my 2 cents.
Yes, here's a video of Gato Figueroa "popping" the speedbag (start at 3:30). I thought what he was doing was very clever and I've seen vids of other pros doing something similar.