This is not some kind of phobia, but something she does when needed as a stress buster. On her walk home from work, she passes under a railway bridge. If she times it right and there is no-one else about, she waits until a train goes over and screams. The noise of the train under the echo-y bridge is far louder than she could ever be, and she finds it a brilliant release of any stress she has built up during the day. Once the train has gone, she continues her walk home refreshed and ready for her family.
Another friend of mine say he gets the same release from going to football matches and shouting for his team (or at the referee!).
In both cases, it is as much about engaging the whole body as it is about the noise.
If you aren’t in a position to actually shout, but want to get the same release, an actor taught me a technique which can be used to quickly lessen tension.
Take yourself away somewhere private (a lavatory cubicle is perfect)
Plant your feet firmly on the floor so you are really rooted to the spot
Tense up all your muscles through the body as though you are going to unleash the most unholy scream you can imagine
Take a deep breath, open your mouth wide and “mime” a scream from deep in your diaphragm, expelling all the air
Basically, you do everything you would if you were screaming, except produce a noise.
Make the “scream” as prolonged as you need and then totally relax every muscle.
Repeat if necessary.
This may sound a bit bizarre, but I have used it myself in the past and taught it to many people who have found it a very beneficial quick fix.
If you want to work on the issues which are making you scream, perhaps I can help. If so, get in touch for a chat.