According to Oates, the 15th Alabama broke the 20th Maine's line about 5 times, pushing the 20th Maine back and them pushing the 15th AL back out, as Oates says in his memoirs:
"We drove the Federals from their strong defensive position; five times they rallied and charged us, twice coming so near that some of my men had to use the bayonet, but in vain was their effort. It was our time now to deal death and destruction to a gallant foe, and the account was speedily settled. I led this charge and sprang upon the ledge of rock, using my pistol within musket length, when the rush of my men drove the Maine men from the ledge. . . . About forty steps up the slope there is a large boulder about midway the Spur. The Maine regiment charged my line, coming right up in a hand-to-hand encounter."
So far, this is the only account I have at hand right now and of course Oates could have exaggerated to some degree. It would interesting if I could find some other accounts of men in the 15th Alabama and 20th Maine and compare their experiences.