I think it would be really funny and interesting if you were on fire, there was a way to run, ragdoll, and "roll" to put out the fire. I completely understand if it would be a "balancing" issue for adding some really easy way to stop being on fire. If this does end up somehow getting added, a wall decal or poster might be a cool way to show the player they can do this. I only thought about this because I ended up setting myself on fire and trying to put myself out.