How to turn off texture painting mode where your brush cursor lags behind your mouse position? I'm playing around with learning how to paint textures in blender, and must have somehow enabled a strange drawing mode that causes the drawing head of my brush to lag behind the place where I'm actually drawing the stroke.

I was able to paint normally earlier.  Now when I draw a stroke, there's this line from the center of my cursor to a point where my brush was earlier, and the stroke is drawn there.  It makes painting much harder and I can't figure out how to turn it off.
I turned Smooth Stroke on.  Once I unchecked that, I went back to the regular painting mode.
The smooth stroke option is found in the Tool Shelf > Tools tab > Stroke section.