Then don't. Exposure therapy isn't 100% proven anyway, and frankly, I think if you work on underlying anxieties then exposure becomes completely unnecessary. I was severely agoraphobic for a while, but it had nothing to do with being outdoors really. Once I was no longer in emotional turmoil for other, completely unrelated reasons, the agoraphobia melted away.

Sometimes I think exposure therapy and the like just makes people hold on to their surface fears and treat them as if they're the real things they're afraid of, when they're just the manifestations of much simpler, more primal issues that need to be dealt with.

My 0.02 anyway.