Charley Horse

I know a horse called Charley; he visits me now and then, but the visits are not pleasant; he always brings me pain. Quite often he shows up in my gastrocnemius; I moan and groan and sometimes scream; the hurt is just tremendous. My wife wakes up and always knows the reason for my pain; she doesn't have to ask, because Old Charley's back again. Sometimes in my bicep, rarely in my tricep, quite often in my trapezius, but let me tell you what: when he's in my gluteus maximus he's a real pain in the butt!