I was in a really bad slump on the local softball team. Got all sorts of useless advice. One guy, who had never said anything, was passing behind the batting cage just yells out 'if you don't keep your back foot planted, I'm going to nail into the ground'. That was it. My back foot was getting antsy. Felt great after that.
On the brain cells, I'm more of the Duran/Bello model. When I was slumping, every pitch looked like a golf ball. I could hit one line drive, and suddenly, every pitch looked as big as a balloon.
It's one of the things I love about BB. You can go from ice-cold to red-hot, without ever knowing the reason.