Addicted to exercise

Is it possible to be truly addicted to exercise?  Today was an off-day for me and I feel a little out of sorts.  I feel a little jazzed up for sure and I thought I was going to hulk out at a meeting.  I definitely wanted to Hulk smash a couple of my colleagues for running their mouths non-stop during this one meeting.  Some people have a fan in their head which just blows hot air.

Anyhow, I'll see if I feel any different tomorrow.  I guess I should sign up for some fitness classes like boxing which I can do on my off days.  I'd like to set up a heavy bag and maybe a speed bag in my basement.  I definitely have the room.