Seconding the heavy bag suggestion I always thought that if one couldn't avoid anger as a physical expression, that a heavy bag would be a good outlet. Serves two purposes. You get a bit of a workout and you spend that aggressive energy on an inanimate object.

For those who see this as still fairly extreme I should say that whacking on a heavy bag isn't a substitute necessarily for someones face. If your anger is that focused than you have a bit more of a problem. Instead it's just a physical release that turns into a mental release. When I used have one it was merely for that. I didn't have people or persons in mind when I did it. I would equate it to any exercise that one can do in a wild burst of emotion and extreme strenuous activity. Riding a bike for example, even fast and crazy isn't as good as this for release. This will expend the max. amount of energy in the shortest time. That's why it works. 3 minutes flailing at a heavy bag? You're pooped. And feeling better. Most people would be anyway. Worked for me. I'd still own one just for the exercise but I don't have anywhere to put one up here. That's the main drawback. You need a basement or garage with room.

Try a heavy bag if you can I/T. Silly suggestion? Perhaps and simplistic too but it can help with stress and frustration on a lot of levels. It's quite practical if you have the room.