Guys, it's not really zone blocking under Bollman.
http://espn.go.com/ncf/columns/davie/1440703.html
He has the O-L take a step opposite to the direction the are going to go, then come back into the direction needed. It gives the OL leverage both from a balance and a force perspective. This is a fairly common technique. It fails when the line does not all move at once and causes the RB to take extra steps comming to the line.