A Frustration

I don't understand how I can think of huge monologues that I want to write on here while I'm walking and never remember them when I'm here to write. It's incredibly frustrating. Twenty-five minutes of walking and composing a rant of epic proportions, then I sit down to write it and can only remember the basic concept. I realize that if I stopped and wrote down some notes, I wouldn't have such a hard time. But I'm usually running around like a maniac, and do not have the time. What I really need is a tape recorder. Then, I can just talk to myself constantly. And isn't that all I really want?