edge chips on glass always break, shoulda not used it

when it
appears you have a dead battery the first thing to do is smuck the terminals with a rock in a turning direction - bad connection will usually be fixed for the moment
have you put new brake hoses on front and back? what you describe is exactly what can happen when a hose starts to break down inside, the lining collapses and prevents fluid return but allows the next push to increase pressure, eventually locking up brakes ... otherwise maybe you had them adjusted too tight to begin with and the heat expanded everything, including the fluid
Bill